ulnar flexor muscle of wrist

n.
  1. A muscle with its origin from the humeral head and from the ulnar head, with insertion to the pisiform bone, with nerve supply from the ulnar nerve, and whose action flexes and abducts the wrist toward the ulna.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.