Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun fish_duck
1 sense of fish duck
Sense 1
merganser, fish duck, sawbill, sheldrake -- (large crested fish-eating diving duck having a slender hooked bill with serrated edges)
=> sea duck -- (any of various large diving ducks found along the seacoast: eider; scoter; merganser)