Definition of merganser
: any of various fish-eating diving ducks (especially genus Mergus) with a slender bill hooked at the end and serrated along the margins and usually a crested head
Origin of merganser
New Latin, from Latin mergus, a waterfowl (from mergere) + anser goose — more at goose
First Known Use: 1668
Learn More about merganser
Britannica.com: Encyclopedia article about "merganser"
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