definition of
MD

[1] #1 MD n. [mendelevium, Md, Mv, atomic number 101] a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol). wn

[2] #2 MD n. [doctor, doc, physician, Dr., medico] a licensed medical practitioner; "I felt so bad I went to see my doctor". wn

[3] #3 MD n. [Maryland, Old Line State, Free State] a Mid-Atlantic state; one of the original 13 colonies. wn

[4] #4 MD n. [Doctor of Medicine] a doctor's degree in medicine. wn