Pronunciation: (lOO'nāt), [key]
1. Anat.the second bone from the thumb side of the proximal row of bones of the carpus.
2. a crescent-shaped, microlithic artifact mounted in a haft to form a composite tool, mostly Mesolithic in origin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.