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Webster 1913 Edition

Canvasback

Can′vas-backˊ

,
Noun.
(Zool.)
A Species of duck (
Aythya vallisneria
), esteemed for the delicacy of its flesh. It visits the United States in autumn; particularly Chesapeake Bay and adjoining waters; – so named from the markings of the plumage on its back.

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