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MedTerms Medical Dictionary A-Z List - S: Detailed Datasheet
Medically reviewed by Min Clinic Staff | Updated: January 2026
Sa-SaSb-ScSd-SfSg-ShSi-SiSj-SlSm-SnSo-SoSp-SpSq-StSu-SuSv-SySz-Sz
SSa-Sa
- S1-S5 (sacral vertebrae)
- SA node
- SAA
- Saami health
- Sabin
- Sabin vaccine
- Sabin, Albert
- Sabin, Florence R.
- Sabulous
- Sac, amniotic
- Sac, dural
- Sac, egg
- Sac, pericardial
- Sac, yolk
- Saccade
- Saccadic movement
- Saccharin
- Saccharomyces cerevisiae
- Saccharomyces cerevisiae genome
- Saccular
- Saccular aneurysm
- Sacral
- Sacral agenesis
- Sacral vertebrae
- Sacrococcygeal
- Sacroiliac joint dysfunction (SI Joint Pain)
- Sacroiliac joint pain
- Sacroiliitis
- Sacrum
- SAD
- Saddle gall
- Saddle sore
- Safe sex
- Safer sex
- Saffir-Simpson hurricane scale
- Saffron
- Sagittal
- Sagittal sinus
- Salaam
- Salaam seizure
- Salabrasion
- Salicylic acid
- Salient
- Saline
- Saliva
- Salivary gland
- Salk Institute
- Salk vaccine
- Salmon safety
- Salmonella
- Salmonella genome
- Salmonellosis
- Salpingo-oophorectomy
- Salt
- Salter-Harris fracture
- Salubrious
- Salutary
- Salvage chemotherapy
- Salvage radiotherapy
- Salvage therapy
- Samaritan
- SAMHSA
- Sample, random
- San Joaquin Valley disease
- Sand, biliary
- Sand-blind
- Sandfly fever
- Sandhoff disease
- Sanfilippo syndrome
- Sanger Centre
- Sanguine
- Saphenous vein
- Saphenous vein, great
- Saphenous vein, large
- Saphenous vein, small
- SAPHO syndrome
- Sapovirus
- Sapphism
- Sapporo-like virus
- Sarcoidosis
- Sarcoma
- Sarcoma botryoides
- Sarcoma, Ewing
- Sarcoma, Kaposi
- Sarcoma, metastatic
- Sarcoma, soft tissue
- Sarcoma, synovial
- SARS
- SARS vaccine
- Sartorius muscle
- SATB2-associated syndrome
- Satellite DNA
- Saturated fat
- Sawbones
- Sawyer's extractor
SSb-Sc
- sBCC
- Scabicide
- Scabies
- Scabies, crusted
- Scaffold
- Scalded skin syndrome
- Scale, Centigrade
- Scale, Fahrenheit
- Scale, skin
- Scales, body fat
- Scaling
- Scalp ringworm
- Scan
- Scan, bone
- Scan, CAT
- Scan, computerized axial tomography
- Scan, computerized tomography
- Scan, CT
- Scan, DXA
- Scan, helical CAT
- Scan, radionuclide
- Scan, SPECT
- Scan, spiral CAT
- Scan, thyroid
- Scanning electron microscope
- Scapula
- Scarification
- Scarlatina
- Scarlet fever
- SCFE
- Schadenfreude
- Schedules, Gesell Developmental
- Scheuermann's disease
- Schistosoma haematobium
- Schistosoma japonicum
- Schistosoma mansoni
- Schistosome
- Schistosomiasis
- Schizencephaly
- Schizoaffective disorder
- Schizoid
- Schizophrenia
- Schizophrenia, childhood
- Schizotypal personality disorder
- Schmorl's node
- Schonlein-Henoch purpura
- School, first American medical
- School, medical
- Schwannoma
- Schwartz-Jampel syndrome
- Sciatic nerve
- Sciatica
- SCID
- Science (journal)
- Science, cognitive
- Scientist, medical
- Scintigraphy
- Scintimammography
- Scler-
- Sclera
- Scleral Buckle
- Scleredema
- Scleredema adultorum
- Sclerencephaly
- Scleritis
- Sclero-
- Scleroconjunctival
- Sclerodactyly
- Scleroderma
- Sclerokeratitis
- Scleromalacia
- Sclerose en plaques
- Sclerosing cholangitis
- Sclerosing panencephalitis, subacute (SSPE)
- Sclerosis
- Sclerosis, multiple
- Sclerotherapy
- SCN (severe congenital neutropenia)
- Scoliosis
- Scoliosis, acquired
- Scoliosis, congenital
- Scoliosis, functional
- Scoliosis, idiopathic
- Scoliosis, nonstructural
- Scoliosis, structural
- Scooter injury
- Scopolamine
- Scorbutic
- Scorbutus
- Score, Apgar
- Score, Gleason
- Scorpion venom
- Scrape
- Scratch test for allergy
- Screening mammogram
- Screening, kidney disease
- Screening, newborn hearing
- Script
- Scrofula
- Scrofulous
- Scrotum
- Scrub
- Scrub in
- Scrub typhus
- Scrub up
- Scrubs
- Scuba health
- Scullcap
- Scurvy
- Scutellaria
- Scutellaria barbata
- SCYA2
SSd-Sf
- SDF-1
- Sea poisoning
- Seabather's itch
- Seasonal affective disorder (SAD)
- Seat belt
- Sebaceous cyst
- Sebaceous gland
- Seborrhea
- Seborrheic dermatitis
- Seborrheic eczema
- Seborrheic keratosis
- Sebum
- Seckel syndrome
- Second cranial nerve
- Second degree burn
- Second Impact Syndrome
- Second stage of labor
- Second wave
- Second-hand smoke
- Secondary amenorrhea
- Secondary amyloidosis
- Secondary atelectasis
- Secondary cataract
- Secondary pulmonary arterial hypertension
- Secondhand smoke
- Secretary's knee
- Secretase, beta-
- Secretin
- Section
- Section, Cesarean
- Section, Cesarian
- Section, cross
- Section, longitudinal
- Section, lower segment Cesarian (LSCS)
- Sedative
- Sedimentation rate
- Seed implantation
- SEER
- SEER program
- Segawa dystonia
- Segment, genomic
- Segmental arterial Doppler pressures
- Seizure
- Seizure disorders
- Seizure, absence
- Seizure, astatic
- Seizure, atonic
- Seizure, automatic
- Seizure, centrencephalic
- Seizure, clonic
- Seizure, complex partial
- Seizure, febrile
- Seizure, focal
- Seizure, focal motor
- Seizure, grand mal
- Seizure, jackknife
- Seizure, Jacksonian
- Seizure, local
- Seizure, myoclonic
- Seizure, partial
- Seizure, petit mal
- Seizure, salaam
- Seizure, tonic-clonic
- Selective Estrogen-Receptor Modulator (SERM)
- selective mutism
- Selective serotonin reuptake inhibitor
- Selective tubal occlusion procedure
- Selenium
- Selenium deficiency
- Selenium excess
- Selenium poisoning
- Selenocysteine
- Selenoprotein
- Selenosis
- Self, fear of
- Self-harm
- Selfish operon
- Sella turcica
- SEM
- Semen
- Semen DNA analysis
- SEMG
- Semiallogeneic
- Seminal vesicle
- Senescence
- Senile
- Senile chorea
- Senile keratosis
- Senile lentigo
- Senility
- Sensation
- Sense
- Sense of smell
- Sense, balance
- Sense-strand RNA virus
- Sensitivity
- Sensitivity, analytic
- Sensorineural deafness with XX gonadal dysgenesis
- Sensorium
- Sensory
- Sensory integration
- Sensory neuron
- Sentinel lymph node
- Sentinel lymph node biopsy
- Sentinel node biopsy
- Sentinel-lymph-node biopsy
- Seoul virus
- Separation anxiety
- Separation anxiety disorder
- Sepsis
- Sepsis, neonatal
- Septal defect, atrial (ASD)
- Septal defect, ventricular (VSD)
- Septate
- Septate vagina
- Septic
- Septic arthritis
- Septic bursitis
- Septicemia
- Septorhinoplasty
- Septuagenarian
- Septum
- Septum, atrial
- Septum, cardiac
- Septum, heart
- Septum, interatrial
- Septum, interventricular
- Septum, nasal
- Septum, ventricular
- Sequela
- Sequelae
- Sequence tagged site (STS)
- Sequence, complementary
- Sequence, conserved
- Sequence, draft DNA
- Sequence, finished DNA
- Sequence, intervening
- Sequence, Klippel-Feil
- Sequence, regulatory
- Sequencing
- Sequester
- Ser
- Serendipity
- Serial amnioreduction
- Serial transverse enteroplasty
- Serine
- SERM
- Seroconversion
- Serositis
- Serotonin
- Serotonin reuptake inhibitor, selective
- Serotype
- Serrated
- Serration
- Serratus
- Serratus anterior
- Serratus magnus
- Serratus posterior inferior
- Serratus posterior superior
- Serum
- Serum amyloid A
- Serum glutamic oxaloacetic transaminase (SGOT)
- Serum glutamic pyruvic transaminase (SGPT)
- Serum hepatitis
- Serving size
- Sesamoid bone
- Sesamoiditis
- Sesquipedalian
- Seven day diet
- Seven-day measles
- Seventh cranial nerve
- Seventh cranial nerve paralysis
- Sever condition
- Severe acute respiratory syndrome
- Severe combined immunodeficiency disease
- Severe congenital neutropenia
- Severe cyclonic storm
- Severe tropical cyclone
- Sex before sports
- Sex chromosome
- Sex region Y
- Sex-determining region, Y
- Sexagenarian
- Sexploitation
- Sexual child abuse
- Sexual jealousy
- Sexual masochism
- Sexual sadism
- Sexually transmitted disease
- Sexually transmitted disease in men
- Sexually transmitted diseases in women
- Sexually transmitted infection
SSg-Sh
- SGA
- SGOT
- SGPT
- Shaken baby syndrome
- Shank
- Shark attack
- Sharp
- Shell egg
- Shell shock
- Sherlock, Sheila
- Shettles method
- Shield, nipple
- Shigella
- Shigellosis
- Shin
- Shin bone fever
- Shin splint
- Shin Splints
- Shin spot
- Shinbone
- Shingle
- Shingles
- Shingles pain
- Ship fever
- Shock
- Shock lung
- Shock syndrome, dengue
- Shock, anaphylactic
- Shock, cardiogenic
- Shock, hypovolemic
- Shock, primary
- Shock, psychologic
- Shock, secondary
- Shock, septic
- Shock, shell
- Shock, spinal
- Shock, toxic
- Shock, vasogenic
- Shopaholic
- Short arm of a chromosome
- Short bowel syndrome
- Short hairpin RNA
- Short-term memory
- Shortness of breath
- Shot, flu
- Shotgun sequencing
- Shots, allergy
- Shotty
- Shoulder
- Shoulder blade
- Shoulder bursitis
- Shoulder dislocation
- Shoulder dystocia
- Shoulder joint
- Shoulder pain
- Shoulder, frozen
- Show
- SHP
- Shprintzen syndrome
- shRNA
- Shulman's syndrome
- Shunt
- Shunt, Blalock-Taussig
- Shunt, Glenn
- Shunt, Spitz-Holter
- Shunt, transjugular, intrahepatic, portosystemic
- Shunt, triculoperitoneal
- Shunt, ventriculoatrial
- Shunt, ventriculopleural
- Shy-Drager syndrome
SSi-Si
- SI joint pain
- Sialidosis
- Siamese twin
- Sib
- Sibling
- Sibship
- Sicca syndrome
- Sick building syndrome
- Sick sinus syndrome
- Sickle cell anemia
- Sickle cell disease
- Sickle cell trait
- Sickle hemoglobin
- Sickness, acute mountain (AMS)
- Sickness, altitude
- Sickness, morning
- Sickness, motion
- Sickness, mountain
- Siddha medicine
- SIDDT
- Side effects
- Sideropenic dysphagia
- Sidney Goldring
- SIDS (sudden infant death syndrome)
- SIDS with dysgenesis of testes
- Sight, day
- Sigma Theta Tau
- Sigmodon hispidus
- Sigmoid
- Sigmoid volvulus
- Sigmoidoscope
- Sigmoidoscopy
- Sigmoidoscopy, flexible
- Sign
- Sign language
- Sign of pregnancy
- Sign, Babinski
- Sign, Gottron
- Sign, Kernig
- Sign, Lhermitte
- Sign, Macewen
- Sign, Tinel's
- Sign, toe
- Signal transduction
- Signal transduction pathway
- Signature
- Sikimitoxin
- Silencing, gene
- Silent stroke
- Silica
- Silicatosis
- Silicosis
- Silk Road disease
- Silver
- Silver bullet
- Silver poisoning
- Simian crease
- Simian virus 40
- Single base change
- Single gene disease
- Single nucleotide polymorphism
- Single palmar flexion crease
- Single palmar flexion line
- Single transverse palmar crease
- Single transverse palmar line
- Single upper palm crease
- Single upper palm line
- Single-blind
- Single-masked
- Single-payer health Care
- Singultus
- Sinoatrial node
- Sinuous
- Sinus
- Sinus arrhythmia
- Sinus barotrauma
- Sinus bradycardia
- Sinus headache
- Sinus node
- Sinus rhythm
- Sinus tachycardia
- Sinus, cavernous
- Sinus, ethmoid
- Sinusitis
- Sinusitus headache
- Sir Charles Bell
- Sirenomelia
- siRNA
- Sirolimus
- Sitophilus granarius
- Sitosterolemia
- Situational syncope
- Situs inversus totalis
- Six fingers or toes
- Sixth cranial nerve
- Sixth disease
SSj-Sl
- Sjogren of Sjogren syndrome
- Sjogren syndrome
- Sjogren-Larsson syndrome
- SJS
- Skeletal
- Skeletal dysplasia
- Skeletal muscle
- Skeleton
- Skeleton, bones of the
- Skin
- Skin abscess
- Skin biopsy
- Skin calipers
- Skin Cancer
- Skin color
- Skin Diseases, National Institute of...
- Skin erosion
- Skin graft
- Skin graft, allogeneic
- Skin graft, autogenic
- Skin graft, composite
- Skin graft, full-thickness
- Skin graft, mesh
- Skin graft, pedicle
- Skin graft, pinch
- Skin graft, porcine
- Skin graft, split-thickness
- Skin plaque
- Skin tag
- Skin test for allergy
- Skin test for immunity
- Skin, scalded, syndrome
- Skin, tattooing of the
- Skittles
- Skittling
- Skull
- Skull, hair-on-end
- Skullcap
- Skute barbata
- SKY (spectral karyotype)
- Slake
- Slanted ear
- Slap cheek
- Slapped cheek
- SLE (systemic lupus erythematosus)
- Sleep
- Sleep apnea
- Sleep apnea, central
- Sleep apnea, obstructive
- Sleep disorders
- Sleep drug
- Sleep hygiene
- Sleep jerk
- Sleep paralysis
- Sleep restriction therapy
- Sleep start
- Sleep talking
- Sleep, non-rapid eye movement
- Sleep, NREM
- Sleep, paroxysmal
- Sleep, rapid eye movement
- Sleep, REM
- Sleep, twilight
- Sleep-disordered breathing
- Sleepiness, excessive daytime (EDS)
- Sleeping disease
- Sleeping sickness, African
- Sleeplessness
- Sleepwalking
- Sleeve, gastric
- Sliding hiatal hernia
- Slipped disc
- Slipped elbow
- Slipped spine
- Slipped vertebra
- Slow virus
- Slow-wave sleep
- SLS (Sjogren-Larsson syndrome)
- Sludge, biliary
- SLV
- Sly syndrome
SSm-Sn
- SMA
- Smad3
- SMAD4
- SMAD4/DPC4
- Small bowel
- Small calorie
- Small calorie (Calorie)
- Small cell lung cancer
- Small eye
- Small for gestational age (SGA)
- Small inducible cytokine A2
- Small inhibitory RNA
- Small intestine
- Small intestine insufficiency
- Small round blue cell tumor
- Small saphenous vein
- Small-Incision Lenticule Extraction (SMILE)
- Smallpox
- Smallpox bioterrorism
- Smallpox vaccination adverse reaction
- Smallpox vaccination antidote
- Smallpox vaccination in eczema
- Smallpox vaccination of eye
- Smallpox vaccination of fetus
- Smallpox vaccine
- Smell
- Smell disorder
- Smell, inability to
- Smith-Lemli-Opitz syndrome
- Smith-Magenis syndrome
- Smoke, environmental tobacco
- Smoke, second-hand
- Smokeless tobacco
- Smoking, involuntary
- Smoking, passive
- Smoldering leukemia
- Smooth muscle
- Snake
- Snake antivenin
- Snake antivenom
- Snake bite
- Snake stick
- SNCA
- Sneeze
- Snellen's chart
- Snip
- Snoreplasty, injection
- Snoring
- Snort
- Snot
- Snowblindness
- Snowmobile safety
- SNP
- Snuff
- Snuffbox, anatomical
SSo-So
- Social anxiety disorder
- Social phobia
- Social psychology
- Social worker, clinical
- Socialized medicine
- Sociogenomics
- Sociopath
- Sociopathic personality
- Sociopathic personality disorder
- Sociophobia
- Sodium
- Sodium perchlorate
- Soft chancre
- Soft palate
- Soft sore
- Soft tissue sarcoma
- Soft ulcer
- Solar keratosis
- Solipsism
- Solitary tapeworm
- Solitude, fear of
- Somatic
- Somatic cell
- Somatic cell nuclear transfer
- Somatic mutation
- Somatization
- Somatoform disorder
- Somatostatin
- Somatotropin
- Somatropin
- Somnambulism
- Somnambulist
- Somniloquy
- Somnolence
- Somnolent
- Somnoplasty
- Son
- Soothing
- Sopor
- Soporific
- Sore
- Sore throat
- Sore, canker
- Sore, cold
- Sorsby's Pseudo-Inflammatory Macular Dystrophy
- Sotos syndrome
- South Sudan disease
- Southeast Asian hemorrhagic fever
- Southern blot
- Southern tick-associated rash illness
- Soy milk allergy
SSp-Sp
- Span, memory
- Spanish disease
- Spanish flu
- Spanish influenza
- Spasm
- Spasm, coronary artery
- Spasm, nictitating
- Spasmodic dysphonia
- Spasms, infantile
- Spastic colitis
- Spastic colon
- Spastic dysphonia
- Spastic paraplegia, autosomal dominant
- Spastic pseudoparalysis
- Spasticity
- SPD calcinosis
- Special pathogen
- Specific developmental disorder
- Specific-pathogen free
- Specificity
- Specificity, analytic
- Speckled iris
- SPECT
- SPECT scan
- Spectral karyotype (SKY)
- Spectrophobia
- Spectrophotometer
- Speculum
- Speculum, ear
- Speculum, nasal
- Speculum, vaginal
- Speech disorder
- Speech therapist
- Speech therapy
- Speech, esophageal
- Speech-language pathologist
- Speed
- Sperm
- Sperm function
- Sperm motility
- Sperm stem cell
- Spermatic cord
- Spermatocide
- Spermatogenesis
- Spermatogonial stem cell
- Spermicide, vaginal
- SPF
- Sphenoid
- Sphenoid bone
- Sphenopalatine neuralgia
- Spherocytosis, hereditary (HS)
- Sphincteroplasty
- Sphingomyelin lipoidosis
- Sphingomyelinase deficiency
- Sphygmomanometer
- Spider bites
- Spider fear
- Spider phobia
- Spider telangiectasia
- Spider veins
- Spin doctor
- Spina bifida
- Spina bifida cystica
- Spina bifida occulta
- Spinal compression
- Spinal cord
- Spinal cord compression
- Spinal cord disease in diabetes
- Spinal cord injury
- Spinal fusion
- Spinal muscular atrophy
- Spinal nerve
- Spinal stenosis
- Spinal Tap
- Spindle cell
- Spindle neuron
- Spine
- Spine, slipped
- Spinocerebellar
- Spinocerebellar ataxia
- Spinous process
- Spiral CAT scan
- Spiral fracture
- Spirochete
- Spirometry
- Spit
- Spitz-Holter valve
- Spleen
- Spleen, ruptured
- Splenectomy
- Splenic artery
- Splenic fever
- Splenic vein
- Splenomegaly
- Splicing, alternative
- Split personality
- Split-hand/split-foot malformation
- Spock, Benjamin
- Spondylitis
- Spondylolisthesis
- Spondylolysis
- Spondylosis
- Spongiform
- Spongiform encephalopathy and cerebral amyloidosis
- Spongy degeneration of the central nervous system
- Spontaneous abortion
- Spontaneous Coronary Artery Dissection (SCAD)
- Sporadic
- Sporadic primary pulmonary hypertension
- Sporotrichosis
- Spot, blind
- Spot, histo
- Spots in front of the eyes
- Spots, Brushfield's
- Spots, Koplik's
- Spotted fever
- Sprain
- Sprain, ankle
- Sprain, metatarsophalangeal joint
- Sprained ankle
- Sprue, nontropical
- Spur, heel
- Sputum
SSq-St
- Squamous cell carcinoma
- Squamous cell carcinoma in situ
- Squamous cells
- Squamous intraepithelial lesion
- Squamous-cell carcinoma
- Squawroot
- SRAS
- SRY
- SSPE
- SSRI
- St John's wort
- St. Anthony's fire
- St. Joseph Moscati
- St. Louis encephalitis
- St. Vitus dance
- Stachybotrys
- Staff of Aesculapius
- Stage
- Stage 4 lung cancer with ALK rearrangement
- Stage of dilatation
- Stage of expulsion
- Staging
- Staging, laparoscopic
- Stain, Gram
- Standard of Care
- Stanley B. Prusiner
- Stanolone
- Stapes
- Staph
- Staph infection
- Staphylococcal infection
- Staphylococcal scalded skin syndrome
- Staphylococcus
- Staphylococcus, antibiotic-resistant
- Stargardt disease
- STARI
- Start, sleep
- Startle disease
- Startle reflex
- Stasis
- Stasis dermatitis
- Stasis ulcer
- STAT
- State cancer registry
- State, acute confusional
- State, hypercoagulable
- Static posture
- Statins
- Status epilepticus
- Statutory rape
- STD
- STDs in men
- STDs in women
- Steal, subclavian
- Steatohepatitis
- Steele-Richardson-Olszewksi syndrome
- Stein-Leventhal syndrome
- Stem cell
- Stem cell harvest
- Stem cell harvest, peripheral blood
- Stem cell transplantation
- Stem cell, sperm
- Stem cell, spermatogonial
- Stem cells
- Stenosis
- Stenosis, aortic
- Stenosis, carotid
- Stenosis, carotid-artery
- Stenosis, pulmonary
- Stenosis, spinal
- Stenosis, subaortic
- Stenotic
- Stent
- Stent, coated
- Stent, medicated
- STEP procedure
- Step protocol
- Step therapy
- Stepfather
- Stepmother
- Steppage gait
- Stercolith
- Stereotactic
- Stereotactic needle biopsy
- Stereotactic radiotherapy
- Stereotactic surgery
- Stereotaxis
- Sterilization, female surgical
- Sterilization, male surgical
- Sterilization, surgical
- Sternal rib
- Sternum
- Sternutation
- Sternutator
- Steroid
- Steroid abuse
- Steroid, designer
- Stethoscope
- Stevens-Johnson syndrome
- Stewart
- Stewart, Alice
- STI
- Stick, heel
- Stickler
- Stickler syndrome
- Stickler syndrome, type I
- Stickler syndrome, type II
- Stickler syndrome, type III
- Stickler's syndrome
- Stickler, Gunnar B.
- Stiff baby syndrome
- Stiff lung
- Stiff-Person syndrome
- Still's Disease
- Stillbirth
- Stilling-Turk-Duane syndrome
- Sting, Africanized bee
- Sting, insect
- Sting, jellyfish
- Sting, yellow jacket
- Stirrup
- STL1
- STL2
- STL3
- Stockholm syndrome
- Stokes Adams attack
- Stoma
- Stomach
- Stomach cancer
- Stomach cramps
- Stomach emptying study
- Stomach fat (belly fat, abdominal fat)
- Stomach flu
- Stomach paralysis
- Stomach, Pavlov
- Stomatitis, Vincent
- Stone, kidney
- Stone, renal
- Stone, tonsil
- Stone-mason's disease
- Stones, cystine kidney
- Stool
- Stool occult blood test
- STOP (selective tubal occlusion procedure)
- Stop codon
- Storm supplies kit
- Storm surge
- Strabismus
- Strabismus surgery
- Straight jacket
- Straight-jacket
- Straightjacket
- Strain
- Strain, lumbar
- Strait
- Strait jacket
- Strait-jacket
- Straitjacket
- Stratum corneum
- Strep
- Strep test, rapid
- Strep throat
- Strep, group A
- Streptococcus
- Streptococcus faecalis
- Streptococcus haemolyticus
- Streptococcus pneumoniae (pneumococcus)
- Streptococcus pyogenes
- Streptococcus, group A
- Streptococcus, group B
- Stress
- Stress echocardiography
- Stress exercise thallium scan
- Stress fracture
- Stress test, pharmacologic
- Stress test, physiologic
- Stress test, radionucleide
- Stress testing, exercise cardiac
- Stretch, quadriceps
- Striatum
- Stricture
- Stricture of the esophagus, chronic
- Stricture, esophagus, acute
- Striopallidodentate calcinosis
- Stripping
- Stroke
- Stroke index
- Stroke volume
- Stroke, heat
- Stroke, National Institute Neurological Disorders
- Stroke, silent
- Strollerobics
- Stroma
- Stromal
- Stromme syndrome
- Strontium
- Strontium ranelate
- Structural genomics
- Structural scoliosis
- STS
- Study population
- Study, antro-duodenal motility
- Study, cross-sectional
- Study, crossover
- Study, diachronic
- Study, electrophysiologic
- Study, Framingham
- Study, gastric emptying
- Study, linkage
- Study, longitudinal
- Study, preclinical
- Study, stomach emptying
- Study, synchronic
- Stuffy nose
- Sturge-Weber syndrome
- Stye
SSu-Su
- Sub-
- Subacute
- Subacute sclerosing panencephalitis (SSPE)
- Subacute spongiform encephalopathy
- Subaortic stenosis
- Subarachnoid
- Subarachnoid hemorrhage
- Subclavian
- Subclavian steal
- Subclinical disease
- Subconjunctival hemorrhage
- Subcu
- Subcutaneous
- Subcutaneous hematoma
- Subdeltoid
- Subdural
- Subdural hematoma
- Subglottis
- Subjacent
- Subject
- Sublingual
- Sublingual gland
- Subluxation
- Subluxation of the radial head
- Submandibular gland
- Submaxillary gland
- Suboxone
- Subq
- Subscapular
- Subscapularis muscle
- Substance
- Substance abuse
- Substance Abuse and Mental Health Services
- Substance, pressor
- Subtelomeric
- Subtotal hysterectomy
- Subungual onychomycosis, proximal white
- Subutex
- Subway diet
- Succenturiate
- Succenturiate placenta
- Succumb
- Suction-assisted lipectomy
- Sudden cardiac arrest
- Sudden Infant Death Syndrome (SIDS)
- Sudden infant death with dysgenesis of testes
- Sudoriferous gland
- Sugar Busters diet
- Suicidal
- Suicide
- Suicide gene
- Suicide prevention
- Suicide, assisted
- Suicide, physician-assisted
- Sulci
- Sulcus
- Sulfa drug
- Sulfite sensitivity
- Sulfonamides
- Sulfonylurea
- Sulfonylurea sensitivity
- Sulphonylurea
- Sumatriptan
- Summer cold
- Sumycin
- Sun poisoning
- Sun protection factor (SPF)
- Sunburn
- Sundowning
- Sune K. Bergstrom
- Sunflower Syndrome
- Sunscreen
- Super spreader
- Super-
- Superaspirin
- Superbug
- Supercentenarian
- Supercilious
- Superfetation
- Superficial
- Superficial spreading melanoma
- Superfluous
- Superfoods
- Superior
- Superior vena cava
- Superior vena cava syndrome
- Superjacent
- Supernumerary
- Supernumerary digit
- Supernumerary nipple
- Supernumerary placenta
- Supertaster
- Supination
- Supinator foot type
- Supine
- Supplies kit, disaster
- Supplies kit, emergency
- Supportive Care
- Suppressant, cough
- Suppurate
- Suppurative arthritis
- Supraglottis
- Suprarenal gland
- Supraspinatus muscle
- Suprasternal notch
- Supraventricular tachycardia
- Surface EMG
- Surfactant
- Surgeon
- Surgeon General
- Surgery
- Surgery, anti-reflux (fundoplication)
- Surgery, cataract
- Surgery, elective
- Surgery, fetal
- Surgery, GERD (fundoplication)
- Surgery, off-pump
- Surgery, plastic
- Surgery, reflux (fundoplication)
- Surgery, retrograde intrarenal (RIRS)
- Surgery, stereotactic
- Surgery, video-assisted
- Surgery, YAG laser
- Surgical menopause
- Surgicenter
- Surrogacy
- Surrogate mother
- Surveillance and containment
- Surveillance of disease
- Surveillance, Epidemiology, and Ends Results
- Susceptibility genes, breast cancer
- Sutton law
- Sutton's law
- Suture
SSv-Sy
- SV 40
- SV40
- Swallower
- Swallowing syncope
- Swallowing tube
- Swan-Ganz catheter
- Sweat
- Sweat chloride test
- Sweat gland
- Sweat gland tumor
- Sweat test
- Sweating
- Sweating, gustatory
- Sweats, night
- Sweet Syndrome
- Sweet wormwood
- Swelling of the brain
- Swimmer's ear
- Swimming pool granuloma
- Swine flu
- Swollen tongue
- Swyer syndrome
- Sydenham chorea
- Sydenham's chorea
- Sydenham, Thomas
- Sylvatic plague
- Sylvius, aqueduct of
- Symbol of medicine
- Symbol of pediatrics
- Symmetric lipomatosis, multiple
- Sympathetic nervous system
- Sympathetic ophthalmia
- Sympathicoblastoma
- Symphysiotomy
- Symphysis pubis
- Symptom
- Symptom of pregnancy
- Symptomatic
- Symptomatic treatment
- Symptoms, withdrawal
- Synaesthesia
- Synapse
- Synapsis
- Synaptic cleft
- Synaptonemal complex
- Syncephaly
- Synchronic study
- Syncope
- Syncope, coughing
- Syncope, defecation
- Syncope, heat
- Syncope, micturition
- Syncope, situational
- Syncope, swallowing
- Syncope, vasodepressor
- Syncope, vasovagal
- Syndactyly
- Syndactyly, bony
- Syndactyly, complete
- Syndactyly, cutaneous
- Syndactyly, partial
- Syndactyly, Poland
- Syndecan
- Syndemic
- Syndromatic hepatic ductular hypoplasia
- Syndrome
- Syndrome of ichthyosis, spasticity, oligophrenia
- Syndrome of Inappropriate Antidiuretic Hormone
- Syndrome X
- Syndrome, Aarskog
- Syndrome, Aarskog-Scott
- Syndrome, Aase-Smith I
- Syndrome, Aase-Smith II
- Syndrome, abdominal muscle deficiency
- Syndrome, Achoo
- Syndrome, acquired immunodeficiency
- Syndrome, acute brain
- Syndrome, acute respiratory distress
- Syndrome, adult respiratory distress
- Syndrome, Alagille
- Syndrome, Alexander
- Syndrome, Alpers
- Syndrome, Alport
- Syndrome, Alstrom
- Syndrome, androgen insensitivity
- Syndrome, antiphospholipid antibody
- Syndrome, aortic arch
- Syndrome, Apert (acrocephalosyndactyly)
- Syndrome, Asperger
- Syndrome, atypical measles (AMS)
- Syndrome, autoimmune polyendocrinopathy
- Syndrome, autoimmune polyglandular (APS)
- Syndrome, Barlow
- Syndrome, battered child
- Syndrome, Behcet's
- Syndrome, Bernard
- Syndrome, Bernard-Soulier
- Syndrome, Bloch-Sulzberger
- Syndrome, Boerhaave's
- Syndrome, Brachmann-de Lange
- Syndrome, Brown
- Syndrome, burning mouth
- Syndrome, carcinoid
- Syndrome, carpal tunnel
- Syndrome, cartilage hair hypoplasia
- Syndrome, cauda equina
- Syndrome, cavernous sinus
- Syndrome, cerebrohepatorenal
- Syndrome, chromosome 4 short-arm deletion
- Syndrome, chromosome 4p-
- Syndrome, Churg-Strauss
- Syndrome, Cockayne
- Syndrome, Coffin-Lowry
- Syndrome, Cogan
- Syndrome, complete androgen insensitivity
- Syndrome, congenital central hypoventilation
- Syndrome, congenital rubella
- Syndrome, Conn
- Syndrome, contiguous gene
- Syndrome, Cornelia de Lange
- Syndrome, cracked tooth
- Syndrome, Creutzfeldt-Jakob
- Syndrome, Cushing
- Syndrome, cyclic vomiting
- Syndrome, Danlos
- Syndrome, de Lange
- Syndrome, deafness-ichthyosis-keratitis
- Syndrome, dengue shock
- Syndrome, DiGeorge
- Syndrome, Down
- Syndrome, Duane
- Syndrome, dumping
- Syndrome, dyskeratosis congenita
- Syndrome, Eagle
- Syndrome, economy class
- Syndrome, Edwards
- Syndrome, Ehlers-Danlos
- Syndrome, Fahr
- Syndrome, fetal alcohol (FAS)
- Syndrome, fish-odor
- Syndrome, floppy baby
- Syndrome, fragile X
- Syndrome, Frey
- Syndrome, Gareis-Mason
- Syndrome, Gelineau
- Syndrome, Gerstmann-Straussler-Scheinker
- Syndrome, giant platelet
- Syndrome, Gilbert
- Syndrome, goiter-deafness
- Syndrome, Gower (situational syncope)
- Syndrome, Guillain-Barre
- Syndrome, Gulf War
- Syndrome, Gustavson
- Syndrome, hand-foot-and-mouth
- Syndrome, Hantavirus pulmonary
- Syndrome, HDR
- Syndrome, Hecht
- Syndrome, HELLP
- Syndrome, hemolytic uremic
- Syndrome, Hermansky-Pudlak (HPS)
- Syndrome, Horner
- Syndrome, Hurler
- Syndrome, hypoplastic left heart
- Syndrome, ichthyosis-keratitis-deafness
- Syndrome, incontinentia pigmenti
- Syndrome, irritable bowel (IBS)
- Syndrome, Jadassohn-Lewandowski
- Syndrome, Johnson-Stevens
- Syndrome, joint hypermobility
- Syndrome, Kartagener's
- Syndrome, Kawasaki
- Syndrome, keratitis-ichthyosis-deafness
- Syndrome, KID
- Syndrome, Kimmelstiel-Wilson
- Syndrome, kinky hair
- Syndrome, Klinefelter
- Syndrome, Klippel-Feil
- Syndrome, Klippel-Trenaunay-Weber (KTW)
- Syndrome, Kostmann
- Syndrome, Landau-Kleffner
- Syndrome, Launois-Bensaude
- Syndrome, Lennox
- Syndrome, Lennox-Gastaut
- Syndrome, Lenz microphthalmia
- Syndrome, Li-Fraumeni (LFS)
- Syndrome, lipodystrophy
- Syndrome, locked-in
- Syndrome, long QT
- Syndrome, Marfan
- Syndrome, Martin-Bell
- Syndrome, Martorell
- Syndrome, MASA
- Syndrome, MASS
- Syndrome, McKusick-Kaufman
- Syndrome, MELAS
- Syndrome, Meniere
- Syndrome, Menkes
- Syndrome, mucocutaneous lymph node
- Syndrome, Munchhausen
- Syndrome, myelodysplastic
- Syndrome, nail-patella
- Syndrome, nervous colon
- Syndrome, Noonan (NS)
- Syndrome, Osler-Rendu-Weber
- Syndrome, Pagon
- Syndrome, Pallister-Killian
- Syndrome, paraneoplastic
- Syndrome, Patau
- Syndrome, patellofemoral (PFS)
- Syndrome, Paterson-Kelly
- Syndrome, Pendred
- Syndrome, Perrault
- Syndrome, Peter Pan
- Syndrome, phantom limb
- Syndrome, Pickwickian
- Syndrome, piriformis
- Syndrome, Pisa
- Syndrome, Poland
- Syndrome, polycystic ovary
- Syndrome, polyglandular autoimmune (PGA)
- Syndrome, popliteal pterygium
- Syndrome, post-polio (PPS)
- Syndrome, Prader-Willi
- Syndrome, premenstrual
- Syndrome, Proteus
- Syndrome, prune belly
- Syndrome, radial aplasia-thrombocytopenia
- Syndrome, Raeder's
- Syndrome, Ramsay Hunt
- Syndrome, reflex sympathetic dystrophy (RSDS)
- Syndrome, Reiter
- Syndrome, renal, with hemorrhagic fever
- Syndrome, Rendu-Osler-Weber
- Syndrome, respiratory distress (RDS)
- Syndrome, Rett
- Syndrome, Reye
- Syndrome, Ricker
- Syndrome, Riley-Day
- Syndrome, Rothmund-Thomson
- Syndrome, SAPHO
- Syndrome, scalded skin
- Syndrome, Shprintzen
- Syndrome, Shulman's (Eosinophilic fasciitis)
- Syndrome, sicca
- Syndrome, sick sinus
- Syndrome, Sjogren
- Syndrome, Sjogren's
- Syndrome, Sjogren-Larsson
- Syndrome, Stein-Leventhal
- Syndrome, Stevens-Johnson
- Syndrome, stiff baby
- Syndrome, superior vena cava
- Syndrome, TAR
- Syndrome, tarsal tunnel
- Syndrome, temporomandibular joint
- Syndrome, testicular feminization
- Syndrome, tetraphocomelia-thrombocytopenia
- Syndrome, third and fourth pharyngeal pouch
- Syndrome, thoracic outlet
- Syndrome, thrombocytopenia-absent radius
- Syndrome, Timothy
- Syndrome, TMJ
- Syndrome, tooth and nail
- Syndrome, Tourette
- Syndrome, toxic shock
- Syndrome, trisomy 13
- Syndrome, trisomy 18
- Syndrome, trisomy 21
- Syndrome, Turner-Kieser
- Syndrome, Usher
- Syndrome, von Hippel-Lindau
- Syndrome, Waardenburg
- Syndrome, Werner
- Syndrome, Witkop
- Syndrome, Wolf-Hirschhorn
- Syndrome, Wolff-Parkinson-White
- Syndrome, Wolfram
- Syndrome, WPW
- Syndrome, yeast
- Syndrome, Zellweger
- Syndrome, Zollinger-Ellison
- Syndromic
- Synesthesia
- Synesthete
- Synovectomy
- Synovia
- Synovial chondromatosis
- Synovial cyst, popliteal
- Synovial fluid
- Synovial lining
- Synovial membrane
- Synovial osteochondromatosis
- Synovial sarcoma
- Synovitis
- Synthesis
- Synuclein
- Syphilis
- Syphilis test (FTA-ABS)
- Syphilis test, RPR
- Syphilis test, VDRL
- Syphilis, congenital
- Syphilis, tertiary
- Syphilitic
- Syringe
- Syringoma
- Syrinx
- System, autonomic nervous
- System, cardiac conduction
- System, cardiovascular
- System, central nervous (CNS)
- System, immune
- System, locomotive
- System, parasympathetic nervous
- System, peripheral nervous (PNS)
- System, sympathetic nervous
- Systemic
- Systemic lupus erythematosus
- Systemic mastocytosis
- Systemic therapy
- Systemic-onset juvenile chronic arthritis
- Systemic-onset juvenile rheumatoid arthritis
- Systems biology
- Systole
- Systole, extra
- Systole, premature
- Systolic
- Systolic click-murmur syndrome
SSz-Sz