What does canvas-back mean?

canvas-back meaning in Etymology Dictionary

in addition canvasback, 1785 as a kind of North American duck. Earlier as an adjective for a kind of apparel made from high priced things ahead and cheap canvas within the back (c.1600); from fabric (n.) + straight back (letter.).

Sentence Examples with the word canvas-back

The ducks include the mallard, black duck, canvas-back and red-head; the Canadian goose, the snowy goose and the blue goose also appear during the migrating seasons.

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