achromatic colour

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a color lacking hue;
white or grey or black
• Syn:
achromatic color
• Ant:
chromatic color (for: achromatic color)
• Hypernyms:
color, colour, coloring, colouring
• Hyponyms:
black, blackness, inkiness, white, whiteness,
gray, grayness, grey, greyness