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 ]