merganser

noun, plural mer·gan·sers, (especially collectively) mer·gan·ser.

1. any of several fish-eating diving ducks of the subfamily Merginae, having a narrow bill hooked at the tip and serrated at the edges.

noun plural -sers or -ser

1. any of several typically crested large marine diving ducks of the genus Mergus, having a long slender hooked bill with serrated edgesAlso called: sawbill See also goosander

n.type of duck, 1752, coined in Modern Latin (1550s), from Latin mergus “waterfowl, diver” (from mergere “to dip, immerse;” see merge (v.)) + anser “goose” (see goose (n.)).