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Definition of Bone mineral density
Medically reviewed by Min Clinic Staff | Updated: January 2026
Bone mineral density: BMD, a measure of bone density, reflecting the strength of bones as represented by calcium content. The BMD test detects osteopenia (mild bone loss, usually without symptoms) and osteoporosis (more severe bone loss, which may cause symptoms). See also: Bone mass density, Osteopenia, Osteoporosis.