| 单词 | canvas-backed duck | 
| 释义 | > as lemmascanvas-backed duck  2.  A North American duck ( Fuligula valisneriana), so called from the colour of the back feathers. Called also more fully  canvas-back duck, and  canvas-backed duck. ΘΚΠ the world > animals > birds > freshwater birds > order Anseriformes (geese, etc.) > subfamily Merginae (duck) > 			[noun]		 > member of genus Aythya (miscellaneous) > aythya valisneriana (canvas-back) canvas-back1785 white-back1790 1785    T. Jefferson Notes Virginia vi. 130  				Besides these [birds] we have..The Widgeon, Sheldrach, or Canvas back, Black head. 1809    A. Wilson Foresters in  Port Folio Nov. 562  				Four large ducks..The far-fam'd canvass-backs. 1832    Blackwood's Edinb. Mag. May 846/2  				The canvass-back stands alone. 1832    Blackwood's Edinb. Mag. May 846/2  				The man who has feasted on canvass-back ducks, cannot philosophically be said to have lived in vain. 1848    W. Irving Hist. N.Y. 		(rev. ed.)	  vii. iii. 393  				The gastronomical merits of..canvas-back ducks. 1859    A. Helps Friends in Council New Ser. I. i. 20  				He had never tasted a canvas-back duck. < as lemmas | 
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