branched chain branched • branched chain ketoaciduria · · · Info · Definitions · Characters · · branched chain · · Text Common · · Latin · · Scripts 14 · · Length 2 · · Syllables Definitions · · · (noun) an open chain of atoms with one or more side chains attached to it. Synonyms: branched chain. · · 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 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072