gill arch gill-ale • gill bailer · · · Info · Definitions · Synonyms · Characters · · gill arch · · Text Common · · Latin · · Scripts 9 · · Length 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: branchial arch, gill bar. · · Noun Definition 1 Synonyms · · · gill · · Synonym 1 lamella · · Synonym 2 branchia · · Synonym 3 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