TRIGEMINAL
trigeminal, trigeminal nerve, trigeminus, nervus trigeminus, fifth cranial nerve
(noun) the main sensory nerve of the face and motor nerve for the muscles of mastication
Source: WordNet® 3.1
Etymology
Adjective
trigeminal (not comparable)
(anatomy) Of or pertaining to the trigeminal nerve (the fifth cranial nerve).
Noun
trigeminal (plural trigeminals)
trigeminal nerve
Source: Wiktionary
Tri*gem"i*nal, a. Etym: [See Trigeminous.] (Anat.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition