noun
- See under guillemot(def 1).
noun
- 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.
noun
- a common guillemot, Cepphus grylle : its summer plumage is black with white wing patches and its winter plumage white with greyish wings
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