Axilla

n.	1.	(Anat.) The armpit, or the cavity beneath the junction of the arm and shoulder.
	2.	(Bot.) An axil.

Noun

1.

axilla - the hollow under the arm where it is joined to the shoulder; "they were up to their armpits in water" Synonyms: armpit, axillary cavity, axillary fossa

armpit, arteria axillaris, axillary artery, axillary cavity, axillary fossa, bodily cavity, cavity, cavum, shoulder