plural noun
Anat·​i·​dae | \əˈnatəˌdē\

Definition of Anatidae 

: a large family of chiefly aquatic birds (order Anseriformes) having relatively heavy bodies, short legs, webbed feet, a bill with a hard horny nail at the tip and transverse toothlike ridges on the biting edges and including the ducks, geese, swans, and related forms

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First Known Use of Anatidae

1824, in the meaning defined above

History and Etymology for Anatidae

New Latin, from Anat-, Anas, type genus + -idae

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The first known use of Anatidae was in 1824

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obstinately defiant of authority

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