/gil"euh mot'/ , n.
1. 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.
2. Brit. a murre of the genus Uria.
[ 1670-80; Guillaume William ]