ach·ro·mat·ic ( k r -mt  k)adj. 1. Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black. 2. Refracting light without spectral color separation. 3. Biology Difficult to stain with standard dyes. Used in reference to cells or tissues. 4. Music Having only the diatonic tones of the scale. [From Greek akhr  matos : a-, without; see a-1 + khrma, khrmat-, color.]ach ro·mati·cal·ly adv.a·chro ma·tism ( -krm-tzm), a·chroma·tici·ty (-ts-t ) n. |
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