nebcin nebby • nebe · · · Info · Definitions · Synonyms · Characters · · nebcin · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) an antibiotic (trade name Nebcin) that is especially effective against Gram-negative bacteria. Synonyms: tobramycin, Nebcin. · · Noun Definition 1 Synonyms · · · tobramycin · · Synonym 1 Characters · · b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E