orbicular muscle


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or·bic·u·lar mus·cle

[TA]
a sphincterlike sheet of muscle that encircles an orifice such as the mouth or the palpebral fissures.
Farlex Partner Medical Dictionary © Farlex 2012

orbicular muscle

A muscle encircling an opening.
See also: muscle
Medical Dictionary, © 2009 Farlex and Partners