brachial muscle

n.
  1. A muscle with its origin in the anterior two thirds of the humerus, with insertion to the coronoid process of the ulna, with nerve supply from the musculocutaneous and radial nerves, and whose action flexes the forearm.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.