guillemot definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various narrow-billed, northern alcidine shorebirds (genera Uria and Cepphus)
Origin: French diminutive of Guillaume, William: see robin
guillemot definition by American Heritage Dictionary
Any of several auks of the genus Cepphus, having black plumage with white markings.
Origin: French, diminutive of the personal name Guillaume.