(uncountable) Androgenic hair growing in the armpit, normally beginning at the onset of, or shortly after, pubarche. / (countable) A single strand of axillary hair.

plural of axillary hair

(anatomy) A large blood vessel that conveys blood from the lateral aspect of the thorax, axilla (armpit) and upper limb toward the heart.

plural of axillary artery

(anatomy) An artery that originates as the continuation of the subclavian artery after crossing the first rib to enter the axilla, and becomes the brachial artery upon passing the inferior border of the teres major muscle.