( a. )
Furnishing or giving two colors; -- said of defective vision, in which all the compound colors are resolvable into two elements instead of three.
( a. )
Furnishing or giving two colors; -- said of defective vision, in which all the compound colors are resolvable into two elements instead of three.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012