['kænvәsbæk]
n.
(产于北美的)帆布潜鸭(因其背羽呈帆布色而得名)

[ noun ]
North American wild duck valued for sport and food
<noun.animal>

Canvasback \Can"vas*back`\, n. (Zo["o]l.)
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.