axillary fossa axillary cavity • axillary node · · · Info · Definitions · Synonyms · Characters · · axillary fossa · · Text Common · · Latin · · Scripts 14 · · Length 6 · · Syllables Definitions · · · (noun) the hollow under the arm where it is joined to the shoulder. Synonyms: armpit, axilla, axillary cavity, axillary fossa. Example: "They were up to their armpits in water." · · Noun Definition 1 Synonyms · · · armpit · · Synonym 1 axilla · · Synonym 2 axillary cavity · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 x latin small letter x U+0078 y latin small letter y U+0079