Dictionary
can•vas•back
Pronunciation: (kan'vus-bak"), [key]—
n.,
—pl. -backs, (esp. collectively) -back.
a North American wild duck,
Aythya valisineria, the male of which has a whitish back and a reddish-brown head and neck.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.