Main Entry: axillary artery Function: noun : the part of the main artery of the arm that lies in the axilla and that is continuous with the subclavian artery above and thebrachial artery below
axillary arteryn. A continuation of the subclavian artery in the armpit, becoming the brachial artery in the arm, with superior thoracic, thoracoacromial, lateral thoracic, subscapular, and posterior and superior circumflex humeral branches.