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orbital muscle in Medicine

orbital muscle

n.
  1. A rudimentary nonstriated muscle, crossing the infraorbital groove and the sphenomaxillary fissure and united with the periosteum of the eye socket.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.