roughage rough • roughcast · · · Info · Definitions · Synonyms · Characters · · roughage · · Text Latin · · Script 8 · · Length Definitions · · · (noun) coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis. Synonyms: fiber. · · Noun Definition 1 Synonyms · · · fiber · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 o latin small letter o U+006F r latin small letter r U+0072 u latin small letter u U+0075