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tem·po·ral·is | \ ˌtem-pə-ˈrā-ˌləs 
\
\Medical Definition of temporalis
: a large muscle in the temporal fossa that serves to raise the lower jaw and is composed of fibers that arise from the surface of the temporal fossa and converge to an aponeurosis which contracts into a thick flat tendon inserted into the coronoid process of the mandible
— called also temporalis muscle, temporal muscle
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