a black or brown-speckled seabird of the genus Cepphus, of northern seas, having a sharply pointed black bill, red legs, and white wing patches, as C. grylle(black guillemot), of the North Atlantic and the similar C. columba(pigeon guillemot) of the North Pacific.
British. a murre of the genus Uria.
Origin of guillemot
1670–80; < French, apparently diminutive of Guillaume William
British Dictionary definitions for black guillemot
black guillemot
noun
a common guillemot, Cepphus grylle : its summer plumage is black with white wing patches and its winter plumage white with greyish wings
guillemot
noun
any northern oceanic diving bird of the genera Uria and Cepphus, having a black-and-white plumage and long narrow bill: family Alcidae (auks, etc), order Charadriiformes
