achromatic

[ ak-ruh-mat-ik, ey-kruh- ]

/ ˌæk rəˈmæt ɪk, ˌeɪ krə- /

SEE MORE SYNONYMS FOR achromatic ON THESAURUS.COM

adjective

Optics.

free from color.
able to emit, transmit, or receive light without separating it into colors.

Biology. (of a cell structure) difficult to stain.

Music. without accidentals or changes in key.

Nearby words

achroite, achromacyte, achromasia, achromat, achromate, achromatic, achromatic colour, achromatic lens, achromatic objective, achromatic prism, achromatic vision

Origin of achromatic

First recorded in 1760–70; a-⁶ + chromatic

Related forms

ach·ro·mat·i·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for achromatic

Thus it is proved beyond all question that the lenses of the eye do not form an achromatic combination.
Curiosities of Light and Sight|Shelford Bidwell
The achromatic lens consists of a double convex lens of crown glass combined with a plano-concave lens of flint glass.
Physics|Willis Eugene Tower
The three illustrations given above afford an idea of the plan of construction of our achromatic objectives.
Microscopes and Accessory Apparatus|Ernst Leitz
The bands are then achromatic in the sense that the ordinary telescope is so.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6|Various

The achromatic doublets have a very large, clear and flat field.
Microscopes and Accessory Apparatus|Ernst Leitz

British Dictionary definitions for achromatic

achromatic

/ (ˌækrəˈmætɪk) /

adjective

without colour

capable of reflecting or refracting light without chromatic aberration

cytology

not staining with standard dyes
of or relating to achromatin

music

involving no sharps or flats
another word for diatonic

denoting a person who is an achromat

Derived Forms

achromatically, adverbachromatism (əˈkrəʊməˌtɪzəm) or achromaticity (əˌkrəʊməˈtɪsɪtɪ), noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for achromatic

achromatic

[ ăk′rə-măt′ĭk ]

adj.

Of or relating to color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.

Refracting light without spectral color separation.

Of or relating to cells or tissues difficult to stain with standard dyes.

Science definitions for achromatic

achromatic

[ ăk′rə-măt′ĭk ]

Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.