plural orbiculares 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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“Orbicularis oris.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/orbicularis%20oris. Accessed 29 Nov. 2024.
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