MD

abbreviation or noun

ˌem-ˈdē 

variants or M.D.

plural MDs or M.D.s

: doctor of medicine

John Smith, MD

She earned an M.D. from Harvard Medical School.

Members pay what they would for a standard, managed-care plan, and they get the same access to MDs and hospitals.

—Geoffrey Cowley et al.

Examples of MD in a Sentence

Recent Examples on the Web

As your abdomen expands to accommodate a growing uterus, your skin and its underlying connective tissues are stretched and your collagen production is impacted, says Suzanne Barnhart, MD, OhioHealth OB/GYN, Pickerington Campus. —Sherri Gordon, Parents, 9 June 2026

Co-lead study author Shinwan Kany, MD, a visiting scientist at the Cardiovascular Research Center with Mass General Brigham Heart and Vascular Institute and the Broad Institute, commented on how these findings could shape preventive care. —Angelica Stabile, FOXNews.com, 9 June 2026

Avoid Alcohol, Caffeine, and Late-Night Meals Meal timing is another lifestyle factor to consider when trying to improve sleep, according to Sharon Brangman, MD, a geriatrician and trustee of the McKnight Brain Research Foundation. —Allison Forsyth, Health, 9 June 2026

The film, produced by MD Pictures and Umbara Brothers Film, is directed by Anggy Umbara from a screenplay by Lele Laila. —Naman Ramachandran, Variety, 9 June 2026

Word History

Etymology

borrowed from Medieval Latin, abbreviation of medicīnae doctor

First Known Use

15th century, in the meaning defined above

Medical Definition

Md

1 of 3 symbol

mendelevium

MD

2 of 3 abbreviation or noun

variants or M.D.

ˌem-ˈdē 

: doctor of medicine

MD

3 of 3 abbreviation

1

medical department

2

muscular dystrophy

Etymology

Latin medicinae doctor