A lot vs. Alot: 9 Grammatical Pitfalls
achromatic ach·ro·mat·ic (āk'rə-māt'ĭk)
Of or relating to color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.
Refracting light without spectral color separation.
Of or relating to cells or tissues difficult to stain with standard dyes.