Webster’s Revised Unabridged Dictionary · 1913
Doucker
Douck′er (dŭk′ẽr or do͞ok′ẽr), n. [From aouck, for duck. See Duck, v. t.] (Zoöl.) A grebe or diver; — applied also to the golden-eye, pochard, scoter, and other ducks. [Written also ducker.] [Prov. Eng.]