M.d.
n. a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol) 同义词：mendeleviumMdMvatomic number 101
a licensed medical practitioner 同义词：doctordocphysicianMDDr.medico
a Mid-Atlantic state; one of the original 13 colonies 同义词：MarylandOld Line StateFree StateMD
a doctor's degree in medicine 同义词：Doctor of MedicineMD