Pertaining to the arm above the elbow.
Referring to the arm, especially the upper arm.
Brachial means ‘belonging to the upper arm’. There are, for example, a brachial artery, and a brachial plexus of nerves through which run all the nerves to the arm. The brachial plexus lies along the outer side of the armpit, and is liable to be damaged in dislocation at the shoulder.