[ ˌakrə(ʊ)'matɪk ]
■ adjective
1》 relating to or denoting lenses that transmit light without separating it into constituent colours.
2》 without colour.
Derivatives
~ity noun
achromatism noun
Origin
C18: via Fr. from Gk a- 'without' + khrōmatikos (from khrōma 'colour').