Definition of achromatic in English:

achromatic

Syllabification: ach·ro·mat·ic
Pronunciation: /ˌakrəˈmatik, ˌākrə-
 
/

adjective

[attributive]
  • 1Relating to, employing, or denoting lenses that transmit light without separating it into constituent colors.
    More example sentences
    • The modern achromatic compound microscope was invented in 1878, and it was this instrument that added the extra dimension of the microscopic study of tissues to anatomical teaching.
    • The 'Barlow lens', a modification of this telescope lens, is a negative achromatic combination of flint glass and crown glass.
    • This behavior is also common in two-material waveplates such as achromatic waveplates constructed from quartz and magnesium fluoride plates.
  • 2 literary Without color: achromatic gloom
    More example sentences
    • Lincoln checked her watch and nodded as an emaciated gray bus spluttered dead; pausing on its way to the ring of featureless, achromatic roads which led to the main structure of South Street ferry port.
    • Random branches hung aimlessly above her head and the neighbors' rose bushes stretched thinly across their metal fence like an achromatic spider web.
    • The ocean, also rather achromatic, kissed the foundation of the towering building, spraying up to the pediment.

Origin

late 18th century: via French from Greek a- 'without' + khrōmatikos (from khrōma 'color').

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