Definition of whiteback:
(n) :
Various species that have a white back, including:
(n) :
A wild duck, the canvasback (Aythya valisineria)
(n) :
The white-backed duck. (Thalassornis leuconotus)
(n) :
The white-backed griffon vulture (Gyps africanus)
(n) :
A Lithuanian breed of cattle, (Lietuvos baltnugariai galvijai)
(n) :
A type of paperboard used in packaging that has a smooth white surface on one side and a brown or unbleached surface on the other side.