tribasic acid tribasic • tribasic sodium phosphate · · · Info · Definitions · Characters · · tribasic acid · · Text Common · · Latin · · Scripts 13 · · Length 5 · · Syllables Definitions · · · (noun) an acid containing three replaceable hydrogen atoms per molecule. Synonyms: tribasic acid. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074