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MedTerms Medical Dictionary A-Z List - H: Detailed Datasheet
Medically reviewed by Min Clinic Staff | Updated: January 2026
Ha-HaHb-HfHg-HkHl-HoHp-HxHy-Hz
HHa-Ha
- H
- H and H
- H and P
- H. erectus
- H. floresiensis
- H. flu
- H. flu genome
- H. flu immunization
- H. heilmannii
- H. sapiens
- H5N1 influenza
- HAART
- Habitual abortion
- Habitus
- Haemophilus influenzae genome
- Haemophilus influenzae type B
- Haemophilus influenzae type B (HIB) immunization
- Hahnemann, Samuel
- Hailey-Hailey Disease
- Hair follicle
- Hair loss
- Hair of the dog
- Hair, exclamation point
- Hair, lanugal
- Hair-on-end skull
- Hairball
- Hairy cell leukemia
- Hairy-cell leukemia
- Halitosis
- Hallermann-Streiff syndrome
- Hallervorden-Spatz disease
- Hallucination
- Hallucination, hypnagogic
- Hallucination, musical
- Hallucinogen
- Hallucinogenic
- Hallucinosis, musical
- Hallux
- Hallux valgus
- Hallux varus
- Hamartoma
- Hamartoma, hypothalamic
- Hammer
- Hammer toe
- Hamstring
- Hand, foot, and mouth disease
- Hand-arm vibration syndrome
- Hand-foot-and-mouth disease
- Hand-foot-and-mouth syndrome
- Handedness
- Hangman injury (Hangman's fracture)
- Hangman's fracture
- Hangover
- Hansen bacillus
- Hansen disease
- Hansen's bacillus
- Hansen's disease
- Hantavirus
- Hantavirus pulmonary syndrome
- HAPE
- Haploid
- Haploinsufficiency
- Hapten
- Hard measles
- Hard palate
- Hardy, James D.
- Hardy-Weinberg law
- Harlequin Ichthyosis
- Hashimoto disease
- Hashimoto thyroiditis
- Hatred of sound
- HAV
- Havana Syndrome
- HAVRIX
- HAVS
- Hay fever
- Hayfever
HHb-Hf
- Hb (hemoglobin)
- HBIG
- HBV
- HCFA
- hCG
- HCM
- Hct (hematocrit)
- HCV
- HCV PCR
- HCV PCR genotype test
- HCV PCR viral detection test
- HCV PCR viral load test
- HDL
- HDL cholesterol
- HDR syndrome
- HDV
- Head and neck cancer
- Head bones
- Head injury
- Head lice
- Head, optic nerve
- Headache
- Headache, alarm clock
- Headache, chronic daily
- Headache, cluster
- Headache, febrile
- Headache, Hogwarts
- Headache, hypnic
- Headache, migraine
- Headache, rebound
- Headache, sinus
- Headache, stress
- Headache, tension
- Headache, thunderclap
- Headache, vascular
- Health
- Health and Human Services
- Health Care Finance Administration
- Health care proxy
- Health for All
- Health Insurance Portability Accountability Act
- Health outcomes research
- Health physics
- Health risk
- Health Saving Account
- Health, Aleut
- Health, arctic
- Health, child
- Health, industrial
- Health, Inuit
- Health, public
- Health, Saami
- Healthy
- Healthy food label
- Hearing aid
- Hearing instrument
- Hearing loss, age-related
- Hearing screening test, newborn
- Heart
- Heart and hand syndrome
- Heart attack
- Heart block
- Heart conduction system
- Heart disease
- Heart disease, rheumatic
- Heart failure
- Heart murmur
- Heart muscle
- Heart rate
- Heart rehab
- Heart rhythm disorders
- Heart septum
- Heart test, EPS
- Heart transplant
- Heart valves
- Heart ventricle
- Heart, artificial
- Heart, left
- Heart, Lung, and Blood Institute, National
- Heart, right
- Heart-hand syndrome
- Heart-lung machine
- Heartburn
- Heartland virus
- Heartworm
- Heat cramps
- Heat exhaustion
- Heat index
- Heat prostration
- Heat rash (Pictures)
- Heat stroke
- Heat syncope
- Heat-related illness
- Heatliness
- Heberden disease
- Heberden node
- Hecht syndrome
- Hecht's pneumonia
- Hecht-Beals syndrome
- Hedonophobia
- Heebie-jeebies
- Heel bone
- Heel prick
- Heel spur
- Heel stick
- Height growth
- Heights, fear of
- Heimlich maneuver
- Hejama
- HeLa cell
- Helical CAT scan
- Helicase
- Helicobacter heilmannii
- Helicobacter pylori
- Helix, alpha
- Helix, double
- HELLP syndrome
- Helmet, bicycle
- Helminth
- Helminthology, medical
- Helminthphobia
- Helper cell
- Hem-onc
- Hemangioma
- Hemangioma, capillary
- Hemangioma, cavernous
- Hemangioma, hepatic
- Hemarthrosis
- Hematemesis
- Hematochezia
- Hematocrit
- Hematohidrosis
- Hematologist
- Hematology
- Hematology-oncology
- Hematoma
- Hematoma, epidural
- Hematoma, extradural
- Hematoma, intracerebral
- Hematoma, intracranial
- Hematoma, nasal septum
- Hematoma, subcutaneous
- Hematoma, subdural
- Hematophobia
- Hematopoiesis
- Hematopoietic
- Hematuria
- Hematuria, gross
- Hematuria, microscopic
- Hemi-
- Hemidesmosome
- Hemidiaphragm
- Hemidiaphragm, elevated
- Hemidiaphragm, raised
- Hemifacial microsomia
- Hemihyperhidrosis
- Hemihypertrophy
- Hemiparesis
- Hemiplegia
- Hemiplegia, alternating
- Hemiplegic
- Hemithorax
- Hemizygous
- Hemochromatosis
- Hemodialysis
- Hemodialysis catheter
- Hemoglobin
- Hemoglobin A
- Hemoglobin A1C
- Hemoglobin E
- Hemoglobin F
- Hemoglobin normal values
- Hemoglobin S
- Hemoglobin, carbon monoxide
- Hemoglobin, glycosylated
- Hemoglobinuria
- Hemolysis
- Hemolytic
- Hemolytic anemia
- Hemolytic disease of the newborn
- Hemolytic jaundice, congenital
- Hemolytic uremic syndrome
- Hemophagocytic lymphohistiocytosis
- Hemophilia
- Hemophilia A
- Hemophilia B
- Hemophilia carrier
- Hemophilia heterozygote
- Hemophobia
- Hemopoietic
- Hemoptysis
- Hemorrhage
- Hemorrhage, subarachnoid
- Hemorrhagic
- Hemorrhagic cyst
- Hemorrhagic diarrhea, E. coli
- Hemorrhagic fever with renal syndrome
- Hemorrhagic fever, epidemic
- Hemorrhoid
- Hemorrhoidectomy
- Hemorrhoids
- Hemostasis
- Hemostasis, genetics of
- Hendra virus
- Henna
- Henoch-Schonlein purpura
- HEPA
- Hepar
- Heparin
- Heparin, low-weight
- Heparin-induced thrombocytopenia
- Hepat-
- Hepatic
- Hepatic artery
- Hepatic biopsy
- Hepatic duct
- Hepatic duct, common
- Hepatic duct, left
- Hepatic duct, right
- Hepatic ductular hypoplasia, syndromatic
- Hepatic encephalopathy
- Hepatic hemangioma
- Hepatic steatosis
- Hepatic transplant
- Hepatic vein
- Hepatic-
- Hepatico-
- Hepatitis
- Hepatitis A
- Hepatitis A immunization
- Hepatitis B
- Hepatitis B immunization
- Hepatitis C
- Hepatitis C PCR
- Hepatitis C virus
- Hepatitis D
- Hepatitis D, E, F, and G
- Hepatitis E
- Hepatitis E virus
- Hepatitis F
- Hepatitis G
- Hepatitis, non-A, non-B
- Hepatitis, toxic
- Hepatitis, viral
- Hepato-
- Hepatobiliary
- Hepatoblastoma
- Hepatocarcinoma
- Hepatocellular carcinoma
- Hepatology
- Hepatoma
- Hepatomegaly
- Hepatosplenomegaly
- Hepatotoxic
- Heptad repeat
- HER1
- HER2
- Hera
- Herbal
- Herbal remedy
- Herbalism
- Herbalist
- Herbicidal
- Herbicide
- Herbicide chemical 2,4-DCP
- Herd Immunity
- Hereditary ALS
- Hereditary amyloidosis
- Hereditary amyotrophic lateral sclerosis
- Hereditary angioedema
- Hereditary angioneurotic edema
- Hereditary arthro-ophthalmopathy
- Hereditary arthroophthalmopathy
- Hereditary atransferrinemia
- Hereditary essential tremor
- Hereditary hemorrhagic telangiectasia
- Hereditary kidney cancer
- Hereditary mixed polyposis syndrome
- Hereditary multi-infarct dementia
- Hereditary mutation
- Hereditary nonpolyposis colon cancer
- Hereditary nonpolyposis colorectal cancer
- Hereditary progressive arthro-ophthalmopathy
- Hereditary prostate cancer
- Hereditary sensory and autonomic neuropathy III
- Hereditary spastic paraplegia, autosomal dominant
- Hereditary spherocytosis
- Heredity
- Heredofamilial tremor
- Hereford genome
- Heritability
- Heritable
- Heritable connective tissue disease
- Hermansky-Pudlak syndrome
- Hernia
- Hernia repair
- Hernia, diaphragmatic
- Hernia, hiatus
- Hernia, Velpeau
- Herniated disc
- Herniation
- Herniorrhaphy
- Heroin
- Heroin addiction
- Herpangina
- Herpes
- Herpes B Virus
- Herpes simplex type 1
- Herpes simplex type 2
- Herpes zoster
- Herpes, febrile
- Herpes, genital
- Herpes, labial
- Herpesvirus
- Herpetiform virus
- Hershey-Chase experiment
- Hetero-
- Heterochromatin
- Heterochromatin, constitutive
- Heterochromatin, facultative
- Heterochromia
- Heterochromia iridis
- Heteroclite
- Heteroerotic
- Heterokaryon
- Heteromorphism
- Heterophyes
- Heteroplasia
- Heteroploid
- Heterosexual
- Heterosexuality
- Heterotaxy
- Heterotaxy Syndrome
- Heterotopic
- Heterotrisomy
- Heterozygote
- Heterozygous
- HEV
- Hex-A deficiency
- Hexadactyly
- Hexenmilch
- Hexosaminidase A
- Hexosaminidase A deficiency
HHg-Hk
- Hg
- HGD
- HHS
- HHT
- HHV-1
- HHV-2
- HHV-3
- HHV-4
- HHV-5
- HHV-6
- HHV-7
- HHV-8
- Hiatal
- Hiatal hernia
- Hiatus
- Hiatus hernia
- HIB
- HIB immunization
- Hibernation reaction
- Hiccough
- Hiccups
- Hidradenitis suppurativa
- Hidrosis
- Hidrotic
- High altitude
- High altitude pulmonary edema
- High blood sugar
- High protein diet
- High-grade lymphoma
- Hip bursitis
- Hip dislocation, congenital
- Hip fracture
- Hip pain
- Hip pointer
- Hip replacement, total
- Hip Subluxation
- Hip, developmental dislocation of the (DDH)
- HIPAA
- Hippocampus
- Hippocrates
- Hippocratic Oath
- Hippophobia
- Hirschsprung disease
- Hirsutism
- Hirudin
- Hirudotherapy
- His
- His disease
- His-Werner disease
- Histamine
- Histamine cephalalgia
- Histidine
- Histiocyte
- Histiocytic necrotizing lymphadenitis
- Histiocytosis
- Histiocytosis X
- Histiocytosis, Hand-Schuller-Christian
- Histiocytosis, Langerhans cell
- Histiocytosis, Letterer Siwe
- Histiocytosis, lipid
- Histiocytosis, malignant
- Histiocytosis, sinus
- Histo
- Histo spot
- Histo-
- Histocompatibility
- Histocompatible
- Histology
- Histone
- Histoplasma
- Histoplasma capsulatum
- Histoplasmosis
- History, developmental
- History, family
- History, medical
- History, social
- Histrionic personality disorder
- HIV
- HIV infection, acute
- HIV infection, primary
- HIV test
- Hives
- Hives from pressure
HHl-Ho
- HLA
- HLA-B57
- HMPS
- hMPV
- HMS1
- HNP
- HNPCC
- Hoarding, pathological
- Hoarseness
- Hobbit
- Hodgkin disease
- Hodgkin, Dorothy
- Hogwarts headache
- Hogweed
- Holandric inheritance
- Hole, macular
- Holmes, Oliver Wendell, Sr.
- Holoprosencephaly
- Holt-Oram syndrome
- Holter monitor
- Homeobox gene
- Homeopath
- Homeopathic
- Homeopathic medicine
- Homeopathy
- Homeostasis
- Homeotherm
- Homicide
- Homo erectus
- Homo floresiensis
- Homo sapiens
- Homo-
- Homocysteine
- Homocystinuria
- Homogentisate 1,2-dioxygenase
- Homogentisate oxidase
- Homogentisic acid oxidase deficiency
- Homograft
- Homolog (homologue)
- Homologies
- Homologous
- Homologous chromosomes
- Homosexual
- Homosexuality
- Homosexuality 1
- Homotrisomy
- Homozygosity
- Homozygote
- Homozygous
- Honey bee allergy
- Honey bee genome
- Hong Kong flu
- Hong Kong influenza
- Hookworm
- Horace Albert Barker
- Horace Barker
- Horizontal
- Hormone
- Hormone therapy
- Hormone therapy (HT)
- Hormone, aldosterone
- Hormone, androgenic
- Hormone, antidiuretic (ADH)
- Hormone, cortisol
- Hormone, erythropoietin
- Hormone, estrogenic
- Hormone, follicle-stimulating (FSH)
- Hormone, glucocorticoid
- Hormone, growth
- Hormone, human chorionic gonadotropin
- Hormone, mineralocorticoid
- Hormone, parathormone
- Hormone, parathyrin
- Hormone, parathyroid
- Hormone, progesterone
- Hormone, secretin
- Hormone, T3
- Hormone, thyroid
- Hormone, thyroid stimulating (TSH)
- Hormone, thyrotropin
- Hormone, thyroxine
- Hormone, triiodothyronine
- Hormone, TSH
- Hormone,T4
- Horner syndrome
- Hornet sting
- Horripilation
- Horror autotoxicus
- Hospice
- Hospice Care
- Hospital
- Hospital code
- Hospital gown
- Hospital-acquired infection
- Hospitalist
- Host
- Hot flashes
- Hotel-Dieu
- Hounsfield
- Hounsfield, Godfrey
- House
- House officer
- House staff
- House surgeon
- Housekeeping gene
- Housemaid's knee
- Howard Hughes Medical Institute
- Hox gene
HHp-Hx
- HPE
- HPIV
- HPS
- HPV
- HRT (hormone replacement therapy)
- HS
- HSA
- HSAN III
- HSP
- Ht
- HT1A
- HTLV
- HTLV-I
- HTLV-II
- HTLV-III
- HTR1A
- Hughes Investigator
- Hughlings Jackson
- Hughlings Jackson, John
- HUGO
- Human chorionic gonadotropin
- Human chromosome count
- Human cloning
- Human Development, . . . (NICHD)
- Human embryonic stem cell
- Human gene map
- Human gene therapy
- Human genome
- Human Genome Organisation
- Human Genome Project
- Human Genome Research Institute, National
- Human growth
- Human herpesvirus 1 (HHV-1)
- Human herpesvirus 2 (HHV-2)
- Human herpesvirus 3
- Human herpesvirus 4
- Human herpesvirus 5
- Human herpesvirus 6
- Human herpesvirus 7
- Human herpesvirus 8 (HHV-8)
- Human immunodeficiency virus
- Human kinome
- Human lymphotropic virus III
- Human metapneumovirus
- Human neutrophil peptide
- Human papilloma virus
- Human papillomavirus
- Human parainfluenza virus
- Human pluripotent stem cell
- Human reproductive cloning
- Human T-lymphotropic virus
- Human T-lymphotropic virus type I
- Human T-lymphotropic virus type III
- Humerus
- Humidifier
- Humidifier fever
- Humor
- Humor, aqueous
- Humoral
- Humoralism
- Humorism
- Hump, dowager
- Hunter syndrome
- huntingtin
- Huntington disease
- Hurler syndrome
- Hurricane
- Hurricane supplies kit
- HUS
HHy-Hz
- Hyaline membrane disease
- Hyaluronic acid
- Hybrid
- Hybridization, fluorescent in situ
- Hybridization, in situ
- Hybridization, nucleic acid
- Hybridoma
- Hydatid disease, alveolar
- Hydatidiform mole
- Hydranencephaly
- Hydrazine
- Hydrocarbon
- Hydrocele
- Hydrocephalus
- Hydrocephalus ex-vacuo
- Hydrocephalus, acquired
- Hydrocephalus, communicating
- Hydrocephalus, congenital
- Hydrocephalus, Macewen sign of
- Hydrocephalus, normal pressure
- Hydrocephaly
- Hydrogen
- Hydrogen cyanide
- Hydronephrosis
- Hydrophobia
- Hydrops fetalis
- Hydrostatic weighing
- Hydroxyapatite
- Hydroxyapatite crystal disease
- Hydroxytryptamine
- Hydroxyurea
- Hygieia
- Hygiene
- Hygiene hypothesis
- Hygiene theory
- Hymen
- Hyoglossus
- Hyper-
- Hyper-IgD syndrome
- Hyperactivity
- Hyperadrenocorticism
- Hyperaldosteronism
- Hyperbaric
- Hyperbaric chamber
- Hyperbilirubinemia
- Hyperbilirubinemia type I
- Hyperbilirubinemia, neonatal
- Hypercalcemia
- Hypercalciuria
- Hypercapnia
- Hypercarbia
- Hyperchloremia
- Hypercholesterolemia
- Hypercoagulability, estrogen-associated
- Hypercoagulable state
- Hyperconscious
- Hyperdontia
- Hyperekplexia
- Hyperemesis gravidarum
- Hyperexplexia
- Hyperextensible
- Hyperglycemia
- Hyperglycemic response
- Hypergraphia
- Hypergraphic
- Hyperhidrosis
- Hyperhidrosis, axillary
- Hyperhidrosis, palmoplantar
- Hyperhidrotic
- Hyperkalemia
- Hyperlexia
- Hyperlipidemia
- Hypermagnesemia
- Hypermnesia
- Hypermobility syndrome
- Hypernatremia
- Hyperopia
- Hyperosmolar
- Hyperosmolarity
- Hyperostosis
- Hyperoxaluria
- Hyperparathyroidism
- Hyperphosphatemia
- Hyperpigmentation
- Hyperplasia
- Hyperplasia of the prostate, nodular
- Hyperplasia, benign prostatic
- Hyperplasia, endometrial
- Hypersensitivity pneumonitis
- Hypertension
- Hypertension, gestational
- Hypertension, pulmonary
- Hypertension, white coat
- Hypertensive
- Hypertensive crisis
- Hyperthermia
- Hyperthermia, malignant
- Hyperthyroid
- Hypertonia
- Hypertonic solution
- Hypertrichosis
- Hypertrophic
- Hypertrophic cardiomyopathy
- Hypertrophic gastritis
- Hypertrophic hypoproteinemic gastropathy
- Hypertrophy
- Hypertrophy, benign prostatic
- Hyperuricemia
- Hyperventilation
- Hypervolemia
- Hypervolemic
- Hypnagogic
- Hypnagogic hallucination
- Hypnic
- Hypnic headache
- Hypnic jerk
- Hypnolepsy
- Hypnopompic hallucination
- Hypnos
- Hypnosis
- Hypo-
- Hypoalbuminemia
- Hypocalcemia
- Hypocapnia
- Hypocarbia
- Hypochloremia
- Hypochondria
- Hypochondriac
- Hypochondriacal neurosis
- Hypochondriasis
- Hypochondriasm
- Hypochondroplasia
- Hypocitraturia
- Hypocol
- Hypodontia and nail dysgenesis
- Hypogeusia
- Hypoglossal nerve
- Hypoglossal neuropathy
- Hypoglycemia
- Hypoglycemia unawareness
- Hypoglycemic
- Hypogonadism
- Hypohidrosis
- Hypohidrotic
- Hypokalemia
- Hypomagnesemia
- Hypomania
- Hypomanic
- Hypomnesia
- Hypomyelination
- Hyponatremia
- Hypoosmolar
- Hypoosmolarity
- Hypoparathyroidism
- Hypopharyngeal diverticulum
- Hypophosphatasia
- Hypophosphatemia
- Hypopigmented
- Hypoplasia
- Hypoplasia of the thymus and parathyroids
- Hypoplasia, syndromatic hepatic ductular
- Hypoplastic anemia-triphalangeal thumbs
- Hypoplastic left heart syndrome
- Hypopnea
- Hypoproteinemic hypertrophic gastropathy
- Hyposmia
- Hypospadias
- Hypotension
- Hypotension, orthostatic
- Hypotension, postural
- Hypotensive
- Hypothalamic hamartoma
- Hypothalamus
- Hypothermia
- Hypothyroidism
- Hypothyroidism, congenital
- Hypothyroidism, infantile
- Hypotonia
- Hypotonic solution
- Hypoventilation
- Hypovolemia
- Hypovolemic
- Hypovolemic shock
- Hypoxemia
- Hypoxia
- Hypoxia-ischemia
- Hypoxic
- Hypoxic-ischemic encephalopathy
- Hysterectomy
- Hysterectomy, abdominal
- Hysterectomy, complete
- Hysterectomy, laparoscopically assisted vaginal
- Hysterectomy, partial
- Hysterectomy, subtotal
- Hysterectomy, total
- Hysterectomy, vaginal
- Hysterosalpingogram (HSG)
- Hysteroscopy