achromatism
無色;消色
achro·ma·tism /(ˈ)eˈkroməˌtɪzəm, æ-/ 名詞
消色差性,消色
A·chro·ma·tism n. The state or quality of being achromatic; as, the achromatism of a lens; achromaticity.
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achromatism
n : the visual property of being without color [syn: colorlessness,
colourlessness] [ant: color]