noun
1. large crested fish-eating diving duck having a slender hooked bill with serrated edges
• Hypernyms: ↑sea duck
• Hyponyms:
↑goosander, ↑Mergus merganser, ↑American merganser, ↑Mergus merganser americanus, ↑red-breasted merganser, ↑Mergus serrator, ↑smew, ↑Mergus albellus, ↑hooded merganser, ↑hooded sheldrake, ↑Lophodytes cucullatus
• Member Holonyms: ↑Mergus, ↑genus Mergus
2. Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill
• Hypernyms: ↑duck
• Hyponyms: ↑shelduck
• Member Holonyms: ↑Tadorna, ↑genus Tadorna
Useful english dictionary. 2012.