Axilla vs. Axillae — What's the Difference?

The axilla (also, armpit, underarm or oxter) is the area on the human body directly under the joint where the arm connects to the shoulder. It also contains many sweat glands.

The armpit.

An armpit, or the corresponding part in a bird or other animal.

A body part analogous to the armpit, such as the hollow under a bird's wing.

An axil.

Plural of axilla

The armpit.

A body part analogous to the armpit, such as the hollow under a bird's wing.

The armpit, or the cavity beneath the junction of the arm and shoulder.

Alternative form of axil

The armpit, or the cavity beneath the junction of the arm and shoulder.

An axil.

The hollow under the arm where it is joined to the shoulder;