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Any of various ducks that feed by diving underwater, including the eiders, goldeneyes, scaups, and scoters.
(Animals) any of various ducks, such as the pochard, scaup, redhead, and canvasback, that inhabit bays, estuaries, lakes, etc, and can dive and swim beneath the surface of the water
any of numerous ducks that dive from the water's surface for their food (contrasted with dabbling duck).
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|Noun||1.||diving duck - any of various ducks of especially bays and estuaries that dive for their food|
duck - small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs