Meaning of ACHROMATIC in English

ACHROMATIC

adj. Optics 1 that transmitts light without separating it into constituent colours (achromatic lens).

2 without colour (achromatic fringe).

Derivatives:

achromatically adv. achromaticity n. achromatism n.

Etymology: F achromatique f. Gk akhromatos (as A-(1), CHROMATIC)

Oxford English vocab.      Оксфордский английский словарь.