Definitions for "Trigeminal"
Of, pertaining to, or designating, the fifth pair of cranial nerves, which divide on each side of the head into three main branches distributed to the orbits, jaws, and parts of the mouth; trifacial.
tres = three + geminus = twin, triplets; fifth cranial nerve with three main branches.
the main sensory nerve of the face and motor nerve for the muscles of mastication