Achromatic

An Illustrated Dictionary of Medicine, Biology and Allied Sciences · 1907 · p. 2

(ah-kro-mat/ -ik). Pertaining to a chroma; 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 .