trigeminal nerve

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Either of the fifth pair of cranial nerves, being the chief sensory nerve of the face and the motor nerve of the muscles of chewing and having sensory and motor functions in the teeth, mouth, and nasal cavity.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy The nerve responsible for sensation and motor function in the face and mouth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the main sensory nerve of the face and motor nerve for the muscles of mastication