Noun doc has 2 senses

• doc(n = noun.person) doctor, dr., md, medico, physician - a licensed medical practitioner; "I felt so bad I went to see my doctor"
has particulars: abortionist, allergist, angiologist, extern, medical extern, gastroenterologist, general practitioner, gp, hakeem, hakim, house physician, resident, resident physician, houseman, intern, interne, medical intern, primary care physician, quack, medical specialist, specialist, operating surgeon, sawbones, surgeon, vet, veterinarian, veterinary, veterinary surgeon, abul-walid mohammed ibn-ahmad ibn-mohammed ibn-roshd, averroes, ibn-roshd, abu ali al-husain ibn abdallah ibn sina, avicenna, ibn-sina, barany, robert barany, bartholin, caspar bartholin, bruce, david bruce, sir david bruce, burrill bernard crohn, crohn, down, john l. h. down, christiaan eijkman, eijkman, etienne-louis arthur fallot, fallot, gilbert, william gilbert, harvey, william harvey, hodgkin, thomas hodgkin, george huntington, huntington, aletta jacobs, jacobs, edward jenner, jenner, harry f. klinefelter, harry fitch kleinfelter, klinefelter, clemence sophia harned lozier, lozier, manson, sir patrick manson, franz anton mesmer, friedrich anton mesmer, mesmer, paracelsus, philippus aureolus paracelsus, theophrastus philippus aureolus bombastus von hohenheim, peter mark roget, roget, ross, sir ronald ross, benjamin rush, rush, albert schweitzer, schweitzer, anna howard shaw, shaw, simpson, sir james young simpson, english hippocrates, sydenham, thomas sydenham, e. a. von willebrand, erik adolf von willebrand, erik von willebrand, von willebrand, willebrand
is a kind of medical man, medical practitioner
is a member of doctor-patient relation

• doc(n = noun.group) commerce, commerce department, department of commerce - the United States federal department that promotes and administers domestic and foreign trade (including management of the census and the patent office); created in 1913;
is a kind of executive department
has parts: bureau of the census, census bureau, national oceanic and atmospheric administration, noaa, technology administration, patent and trademark office database, patent office