temporal muscle

n.
  1. A muscle with origin from the temporal fossa, with insertion into the anterior border of the ramus and the mandible, with nerve supply from the deep temporal branches of the mandibular division of the trigeminal nerve, and whose action closes the jaw.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.