What is "goosander"

Goosander \Goos"an`der\, n. [OE. gossander, a tautological word formed fr. goose + gander. Cf. Merganser.] (Zo["o]l.) A species of merganser ( M. merganser) of Northern Europe and America; -- called also merganser, dundiver, sawbill, sawneb, shelduck, and sheldrake. See Merganser.

n. A merganser, ''Mergus merganser'', of the northern hemisphere. They eat fish and are common on lakes and rivers.

n. common merganser of Europe and North America [syn: Mergus merganser]