Source : Webster's Revised Unabridged Dictionary (1913)

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.

   2. Of the nature of an arm; resembling an arm.

Source : WordNet®

brachial
     adj : of or relating to an arm; "brachial artery"