Definition of trigeminal nerve
: either of a pair of large mixed nerves that are the fifth cranial nerves and supply motor and sensory fibers mostly to the face —called also trigeminal
First Known Use of trigeminal nerve
Medical Definition of trigeminal nerve
: either of the fifth pair of cranial nerves that are mixed nerves and in humans are the largest of the cranial nerves and that arise by a small motor root and a larger sensory root which both emerge from the side of the pons with the sensory root bearing the trigeminal ganglion and dividing into ophthalmic, maxillary, and mandibular nerves and the motor root supplying fibers to the mandibular nerve and through this to the muscles of mastication—called also fifth cranial nerve, trifacial nerve, trigeminus
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