Medical Dictionary

orbicularis oris

noun \-ˈōr-əs\
plural orbiculares oris

Definition of ORBICULARIS ORIS

:  a muscle made up of several layers of fibers passing in different directions that encircles the mouth and controls most movements of the lips (as compressing, closing, or pursing movements)

Illustration of ORBICULARIS ORIS

April 01, 2015
diapause Hear it
a period of physiological dormancy
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