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achromatic

[ ak-ruh-mat-ik, ey-kruh- ]
/ ˌæk rəˈmæt ɪk, ˌeɪ krə- /
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adjective
Optics.
  1. free from color.
  2. 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.
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Origin of achromatic

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

OTHER WORDS FROM achromatic

ach·ro·mat·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use achromatic in a sentence

British Dictionary definitions for achromatic

achromatic
/ (ˌækrəˈmætɪk) /

adjective
without colour
capable of reflecting or refracting light without chromatic aberration
cytology
  1. not staining with standard dyes
  2. of or relating to achromatin
music
  1. involving no sharps or flats
  2. another word for diatonic
denoting a person who is an achromat

Derived forms of achromatic

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

Scientific definitions for achromatic

achromatic
[ ăk′rə-mătĭk ]

Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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