Source : WordNet®

erythromycin
     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: {Erythrocin},
          {E-Mycin}, {Ethril}, {Ilosone}, {Pediamycin}]