noun
also tri·gem·i·nal “
( -s )
: either of the fifth pair of cranial nerves that are mixed nerves and in man are the largest of the cranial nerves and that arise by a small motor and a larger sensory root which both emerge from the side of the pons with the sensory root bearing the Gasserian 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