olfactory nerve

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

• noun Either of the first pair of cranial nerves that conduct impulses from the mucous membranes of the nose to the olfactory bulb.

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

• noun First of twelve paired cranial nerves, which carries information from the nasal cavity to the brain.

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

• noun a collective term for numerous olfactory filaments in the nasal mucosa