gill slit gill-shaped • gillstoup · · · Info · Definitions · Synonyms · Characters · · gill slit · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes. Synonyms: gill slit, branchial cleft, gill cleft. · · Noun Definition 1 Synonyms · · · branchial cleft · · Synonym 1 gill cleft · · Synonym 2 Characters · · space U+0020 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C s latin small letter s U+0073 t latin small letter t U+0074