a substance with antibiotic properties, obtained from certain species of Streptomyces
puromycin in American English
(ˌpjuroʊˈmaɪsɪn; ˌ pjʊroʊmaɪsɪn)
US
noun
an antibiotic, C22H29N7O5, produced by a soil actinomycete (Streptomyces alboniger), effective against various parasites, bacteria, etc.: it interferes with protein synthesis and can inhibit long-term memory