"erythromycin" in the noun sense
1. erythromycin, Erythrocin, E-Mycin, Ethril, Ilosone, Pediamycin
an antibiotic (trade name Erythrocin or E-Mycin or Ethril or Ilosone or Pediamycin) obtained from the actinomycete Streptomyces erythreus effective against many Gram-positive bacteria and some Gram-negative
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License