noun, Anatomy.
either one of the twelfth pair of cranial nerves, consisting of motor fibers that innervate the muscles of the tongue.
the twelfth cranial nerve, which supplies the muscles of the tongue

hypoglossal nerve n.
Either of a pair of nerves that arise from the medulla, pass through the hypoglossal canal, and supply muscles of the tongue and the styloglossus, hyoglossus, and genioglossus muscles. Also called twelfth cranial nerve.


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