external gill external ear • external iliac artery · · · Info · Definitions · Characters · · external gill · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) occurs in some mollusks and in tadpoles and other immature amphibians. Synonyms: external gill. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 x latin small letter x U+0078