n.
Either of the external openings of the nose; a naris.
[Middle English nostrille, from Old English nosthyrl : nosu, nose + thyrl, hole.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.