tannic acid tannic • tannide · · · Info · Definitions · Synonyms · Characters · · tannic acid · · Text Common · · Latin · · Scripts 11 · · Length 4 · · Syllables Definitions · · · (noun) any of various complex phenolic substances of plant origin; used in tanning and in medicine. Synonyms: tannin, tannic acid. · · Noun Definition 1 Synonyms · · · tannin · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E t latin small letter t U+0074