Md

1 of 4

abbreviation (1)

Maryland

Md

2 of 4

symbol

mendelevium

MD

3 of 4

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.

MD

4 of 4

abbreviation (2)

1

[Italian mano destra] right hand

2

Maryland

3

medical department

4

minidisc

5

months after date

6

muscular dystrophy

Examples of Md in a Sentence

Recent Examples on the Web

Abbreviation or noun

The study was a collaboration between Arnsten’s laboratory and the laboratory of Lauren Hachmann Sansing, MD, professor of neurology at YSM. —Isabella Backman, Hartford Courant, 6 Jan. 2026

David McCarty, 59, was piloting the MD 369FF chopper, taking his nieces — Rachel McCarty, 23, Faith McCarty, 21, and Katelyn Heideman, 22 — for a ride, The Arizona Republic reported. —Theresa Braine, New York Daily News, 5 Jan. 2026

Why Vitamin D Is Better for Immunity If your goal is immune support, vitamin D matters more, Kevin Gendreau, MD, an obesity and family medicine physician in Massachusetts, told Health. —Allison Forsyth, Health, 4 Jan. 2026

The Federal Aviation Administration said the helicopter was an MD 369FF. —Phil Helsel, NBC news, 3 Jan. 2026

Word History

Etymology

Abbreviation or noun

borrowed from Medieval Latin, abbreviation of medicīnae doctor

First Known Use

Abbreviation Or Noun

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

Abbreviation or noun

Latin medicinae doctor