Wordnet 3.0
NOUN (1)
1. 
 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; 
[syn: erythromycin, Erythrocin, E-Mycin, Ethril, Ilosone, Pediamycin]
WordNet (r) 3.0 (2006):
Erythrocin
    n 1: 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 [syn:
         erythromycin, Erythrocin, E-Mycin, Ethril,
         Ilosone, Pediamycin]