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masticatory system

n.
  1. The organs and structures primarily functioning in mastication, including jaws and jaw muscles, teeth, temporomandibular joints, tongue, lips, cheeks, and mucous membranes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.