Akademik

white gull having a black back and wings

: any of several gulls having the back and upper surface of the wings of a very dark slate or black color as adults — see great black-backed gull, lesser black-backed gull

any of several white gulls, as Larus marinus (great black-backed gull), having a black back and wings.

[1770-80]

black-backed gull «BLAK _BAKT»,

either of two gulls of the Atlantic coasts of Europe and North America, having backs and upper wing surfaces of a dark slate color.