orbicularis oris

noun
\ -ˈōr-əs How to pronounce orbicularis oris (audio) \
plural orbiculares oris

Medical 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)

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to reflect, repel, echo, or resound

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