oculomotor nerve

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

• noun Either of the third pair of cranial nerves, which originate in the midbrain and control most of the muscles that move the eyeballs.

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

• noun The third of twelve paired cranial nerves, which controls most of the eye's movements and constriction of the pupil and maintains an open eyelid.

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

• noun supplies extrinsic muscles of the eye