from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various large Old World ducks of the genus Tadorna, especially T. tadorna, having predominantly black and white plumage. Also called shelduck.
- n. See merganser.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An Old World duck of the genus Tadorna.
- n. A merganser.
- n. A male shelduck.
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of several species of large Old World ducks of the genus Tadorna and allied genera, especially the European and Asiatic species. (Tadorna cornuta syn. Tadorna tadorna), which somewhat resembles a goose in form and habit, but breeds in burrows.
- n. Any one of the American mergansers.
from The Century Dictionary and Cyclopedia
- n. A duck of either of the genera Tadorna and Casarca.
- n. The shoveler-duck, Spatula clypeata, whose variegated plumage somewhat resembles that of the sheldrake.
- n. A merganser or goosander; especially, the red-breasted merganser, also called shelduck.
- n. The canvasback duck.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. large crested fish-eating diving duck having a slender hooked bill with serrated edges
- n. Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill
Middle English shelddrake : scheld, variegated; see skel-1 in Indo-European roots + drake, drake.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English sheld- (akin to Middle Dutch shillede ("parti-colored")) + drake ("male duck") (Wiktionary)