pl. -·backs· or -·back·
a large, North American wild duck (Aythya valisneria) with a brownish-red head, dark breast, and light-gray back, hunted as a game bird
Origin of canvasback; from the grayish, canvaslike appearance of the back
A North American diving duck (Aythya valisineria), having a reddish-brown head and neck and a whitish back in the male.
- A North American wild duck, Aythya valisineria, popular as a game bird.