Mdnoun
a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)
Mdnoun
a licensed medical practitioner;
Mdnoun
a Mid-Atlantic state; one of the original 13 colonies
Mdnoun
a doctor's degree in medicine
Phdnoun
an American doctorate usually based on at least 3 years graduate study and a dissertation; the highest degree awarded by a graduate school