1. Free from color; transmitting light without color-related distortion.
  2. Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
  3. Uncolored; not absorbing color from a fluid; -- said of tissue
  4. Having only the diatonic notes of the scale; not modified by accidentals.
  5. Being achromatic in subject
    The lecture was achromatic, the speaker used politics to suppress the weight of his/her subject.

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