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 Synonym(s):erythromycin, Erythrocin, E-Mycin, Ethril, Ilosone, Pediamycin