/truy jem"euh nl/ , Anat.
1. of or pertaining to the trigeminal nerve.
2. Also called trigeminal nerve . either one of the fifth pair of cranial nerves, consisting of motor fibers that innervate the muscles of mastication, and of sensory fibers that conduct impulses from the head and face to the brain.
[ 1820-30; trigemin ( us ) (L: triple, equiv. to tri- TRI- + geminus twin, double) + -AL 1 ]