noun.
Any seabird belonging to the genera Uria and Cepphus of the auk family Alcidae. They have black and white bodies and are good at swimming and diving.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
small black or brown speckled auks of northern seas
Word Usage
"The guillemot is a diving bird found in the Northern seas, while the penguin may be looked upon as representing the divers of the Southern Ocean."