Meaning of ACHROMATIC COLOUR

WordNet Dictionary
	Definition:		[n]  a color lacking hue; white or gray or black
	Synonyms:		achromatic color
	Antonyms:		chromatic color, chromatic colour, spectral color, spectral colour
	See Also:		black, blackness, color, coloring, colour, colouring, gray, grayness, grey, greyness, white, whiteness