nounpl. -·sers or -·ser
any of several fish-eating, diving ducks with a long, slender, serrated bill hooked at the tip and, usually, a crested head, as the large common merganser (Mergus merganser) and the small hooded merganser (Lophodytes cucullatus)
Origin of merganserModern Latin from Classical Latin mergus, diver (waterfowl) from mergere (see merge) + anser, goose
Any of various fish-eating diving ducks primarily of the genus Mergus, having a slim hooked bill. Also called sheldrake .
Origin of merganserNew LatinLatin mergus diver ( from mergere to plunge )Latin ānser goose ; see ghans- in Indo-European roots.