Search Result for "achromatic colour":
Wordnet 3.0

NOUN (1)

1. a color lacking hue; white or grey or black;
[syn: achromatic color, achromatic colour]



WordNet (r) 3.0 (2006):

achromatic colour
    n 1: a color lacking hue; white or grey or black [syn:
         achromatic color, achromatic colour] [ant: chromatic
         color, chromatic colour, spectral color, spectral
         colour]