orbicular muscle of eye
- A muscle consisting of three parts: the orbital or external part, the palpebral or internal part, and the lacrimal part. The nerve supply of all three parts is from the facial nerve; the action of all three parts closes the eye and wrinkles the forehead vertically.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.