Noun md has 4 senses
  1. 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)
    --1 is a kind of chemical element, element
  2. doctor, doc, physician, MD, Dr., medico - a licensed medical practitioner; "I felt so bad I went to see my doctor"
    --2 is a kind of medical practitioner, medical man
    --2 is a member of doctor-patient relation
    --2 has particulars:
     abortionist; allergist; angiologist; extern, medical extern; gastroenterologist; general practitioner, GP; hakim, hakeem; house physician, resident, resident physician; intern, interne, houseman, medical intern; primary care physician; quack; specialist, medical specialist; surgeon, operating surgeon, sawbones; veterinarian, veterinary, veterinary surgeon, vet; Averroes, ibn-Roshd, Abul-Walid Mohammed ibn-Ahmad Ibn-Mohammed ibn-Roshd; Avicenna, ibn-Sina, Abu Ali al-Husain ibn Abdallah ibn Sina; Barany, Robert Barany; Bartholin, Caspar Bartholin; Bruce, David Bruce, Sir David Bruce; Crohn, Burrill Bernard Crohn; Down, John L. H. Down; Eijkman, Christiaan Eijkman; Fallot, Etienne-Louis Arthur Fallot; Gilbert, William Gilbert; Harvey, William Harvey; Hodgkin, Thomas Hodgkin; Jacobs, Aletta Jacobs; Jenner, Edward Jenner; Klinefelter, Harry F. Klinefelter, Harry Fitch Kleinfelter; Lozier, Clemence Sophia Harned Lozier; Manson, Sir Patrick Manson; Mesmer, Franz Anton Mesmer, Friedrich Anton Mesmer; Paracelsus, Philippus Aureolus Paracelsus, Theophrastus Philippus Aureolus Bombastus von Hohenheim; Roget, Peter Mark Roget; Ross, Sir Ronald Ross; Rush, Benjamin Rush; Schweitzer, Albert Schweitzer; Shaw, Anna Howard Shaw; Simpson, Sir James Young Simpson; Sydenham, Thomas Sydenham, The English Hippocrates; Willebrand, von Willebrand, E. A. von Willebrand, Erik von Willebrand, Erik Adolf von Willebrand
  3. Maryland, Old Line State, Free State, MD - a Mid-Atlantic state; one of the original 13 colonies
    --3 is a kind of American state
    --3 is a part of Mid-Atlantic states
    --3 has parts:
     Aberdeen; Annapolis, capital of Maryland; Baltimore; Fort Meade, Fort George Gordon Meade, Fort George G. Meade; Frederick; Hagerstown; Chesapeake Bay; Potomac, Potomac River; Susquehanna, Susquehanna River
  4. Doctor of Medicine, MD - a doctor's degree in medicine
    --4 is a kind of doctor's degree, doctorate
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