gramicidin Gram-fast • graminaceae · · · Info · Definitions · Characters · · gramicidin · · Text Latin · · Script 10 · · Length 4 · · Syllables Definitions · · · (noun) an antibiotic produced by a soil bacterium; used chiefly as an antiseptic in treating local infections produced by Gram-positive bacteria. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072