(ah-kro-mat -ik) Pertaining to achroma; without color. A. Lens, one the dispersing power of which is exacdy neutralized by another lens having the same curvature but of unequal refractive index. See also Aberration and Objective. A. Triplet. See Microscope.

Link to This Definition
Did you find this definition of ACHROMATIC helpful? You can share it by copying the code below and adding it to your blog or web page.
Definition of  ACHROMATIC