n. Any of various diving ducks of the genera Mergus or Lophodytes, which feed on fish and have a sharply serrated bill.
the GNU version of the Collaborative International Dictionary of English
n. Any bird of the genus Mergus (Merganser), and allied genera of the subfamily Merginae. They are allied to the ducks, but have a sharply serrated bill, eat fish, and dive for food. Also called fish duck.
The Century Dictionary and Cyclopedia
n. A bird of the genus Mergus or subfamily Merginǣ; family Anatidæ; a sawbill, garbill, or fishing-duck.
n. [capitalized] A genus of Merginæ same as Mergus.
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
Word Usage
""Well -- it's called a merganser in the books," said Mr. Kincaid."