WordNet (r) 3.0 (2006):

oxytetracycline
    n 1: a yellow crystalline antibiotic (trademark Terramycin)
         obtained from a soil actinomycete; used to treat various
         bacterial and rickettsial infections [syn:
         oxytetracycline, hydroxytetracycline, oxytetracycline
         hydrochloride, Terramycin]