respiratory tract respiratory system • respiratory tract infection · · · Info · Definitions · Synonyms · Characters · · respiratory tract · · Text Common · · Latin · · Scripts 17 · · Length 6 · · Syllables Definitions · · · (noun) the passages through which air enters and leaves the body. Synonyms: respiratory tract, airway. · · Noun Definition 1 Synonyms · · · airway · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 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 y latin small letter y U+0079