gill arch gill-ale • gillaroo · · · Info · Definitions · Synonyms · Characters · · gill arch · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) one of the bony or cartilaginous arches on each side of the pharynx that support the gills of fishes and aquatic amphibians. Synonyms: gill arch, branchial arch, gill bar. · · Noun Definition 1 Synonyms · · · branchial arch · · Synonym 1 gill bar · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072