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From WordNet (r) 2.0 : [ wn ]
Ethril n : 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, Ilosone, Pediamycin]