The Collaborative International Dictionary of English v.0.48:
Brachial \Brach"i*al\or, a. [L. brachialis (bracch-), from bracchium (bracch-) arm: cf. F. brachial.] 1. (Anat.) Pertaining or belonging to the arm; as, the brachial artery; the brachial nerve. [1913 Webster] 2. Of the nature of an arm; resembling an arm. [1913 Webster]WordNet (r) 3.0 (2006):
brachial adj 1: of or relating to an arm; "brachial artery"