Dictionary

axilla

noun ax·il·la \ag-ˈzi-lə, ak-ˈsi-\
plural ax·il·lae\-(ˌ)lē, -ˌlī\ or ax·il·las

Definition of AXILLA

:  the cavity beneath the junction of a forelimb and the body; especially :  armpit

Origin of AXILLA

Latin, diminutive of ala wing, upper arm, armpit, axil — more at aisle
First Known Use: 1616

axilla

noun ax·il·la \ag-ˈzil-ə, ak-ˈsil-\   (Medical Dictionary)
plural ax·il·lae \-(ˌ)ē, -ˌī\ or ax·il·las

Medical Definition of AXILLA

:  the cavity beneath the junction of the arm or anterior appendage and shoulder or pectoral girdle containing the axillary artery and vein, a part of the brachial plexus of nerves, many lymph nodes, and fat and areolar tissue; especially :  armpit

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