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Either of two gray gulls, Rissa tridactyla or R. brevirostris of northern oceans, that nest in colonies on sea cliffs.
[Perhaps imitative of its cry.]
(Animals) either of two oceanic gulls of the genus Rissa, esp R. tridactyla, having a white plumage with pale grey black-tipped wings and a square-cut tail. Also called: hacklet
[C17: of imitative origin]
either of two small cliff-nesting gulls of the genus Rissa, of northern seas.