Medical term:
orbiculi
orbiculus
(or-bik'u-lus) plural.orbiculi [L., little circle]Muscle surrounding an orifice; a sphincter muscle.
orbiculus ciliaris
The portion of the ciliary body consisting of a bandlike zone lying directly anterior to the ora serrata. Synonym: ciliary ring
orbiculus oris
The circular muscle surrounding the mouth. It is a muscle of facial expression, innervated by the facial nerve.
Medical Dictionary, © 2009 Farlex and Partners
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