ach·ro·mat·ic
(ăk′rə-măt′ĭk, ā′krə-)adj.1. Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.
2. Refracting light without spectral color separation.
3. Biology Difficult to stain with standard dyes. Used in reference to cells or tissues.
4. Music Having only the diatonic tones of the scale.
[From Greek akhrōmatos : a-, without; see a-1 + khrōma, khrōmat-, color.]
ach′ro·mat′i·cal·ly adv.
a·chro′ma·tic′i·ty (-tĭs′ĭ-tē) n.
a·chro′ma·tism (ā-krō′mə-tĭz′əm) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
achromatic
(ˌækrəˈmætɪk) adj1. without colour
2. (General Physics) capable of reflecting or refracting light without chromatic aberration
3. (Biology)
cytology a. not staining with standard dyes
b. of or relating to achromatin
4. (Classical Music)
music a. involving no sharps or flats
5. (Medicine) denoting a person who is an achromat
ˌachroˈmatically adv
achromatism, achromaticity n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ach•ro•mat•ic
(ˌæk rəˈmæt ɪk, ˌeɪ krə-)
adj. 1. free from color; lacking hue.
2. able to emit, transmit, or receive light without separating it into colors.
3. (of a cell structure) difficult to stain.
4. without accidentals in musical key.
[1760–70]
ach`ro•mat′i•cal•ly, adv.
a•chro•ma•tism (eɪˈkroʊ məˌtɪz əm) a•chro`ma•tic′i•ty (-ˈtɪs ə ti) n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.