Find the word definition

Wiktionary
great black-backed gull

n. A large European and American gull, ''Larus marinus''.

WordNet
great black-backed gull

n. white gull having a black back and wings [syn: black-backed gull, cob, Larus marinus]

Wikipedia
Great black-backed gull

The great black-backed gull (Larus marinus), also known as the greater black-backed gull or, informally, as the black-back, is the largest member of the gull family. It breeds on the European and North American coasts and islands of the North Atlantic and is fairly sedentary, though some black-backs move farther south or inland to large lakes or reservoirs. The adult great black-backed gull has a white head, neck and underparts, dark grey wings and back, pink legs and yellow bill.