achromatic

adjective

1. 1

   Free from color; transmitting light without color-related distortion.

2. 2

   Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.

3. 3

   Uncolored; not absorbing color from a fluid; -- said of tissue

4. 4

   Having only the diatonic notes of the scale; not modified by accidentals.

5. 5

   Being achromatic in subject

   “The lecture was achromatic, the speaker used politics to suppress the weight of his/her subject.”