external respiration external orifice • externals · · · Info · Definitions · Synonyms · Characters · · external respiration · · Text Common · · Latin · · Scripts 20 · · Length 7 · · Syllables Definitions · · · (noun) the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation. Synonyms: breathing, external respiration, respiration, ventilation. · · Noun Definition 1 Synonyms · · · breathing · · Synonym 1 respiration · · Synonym 2 ventilation · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 x latin small letter x U+0078