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a combining form meaning “color,” used in the formation of compound words in this sense and in the specialized sense of “chromatin”:
chromatophore; chromatolysis.
Also, especially before a vowel, chromat-.
Origin of chromato-
< Greek chromat-, stem of chrôma color + -o- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for chromato-


combining form
indicating colour or coloured: chromatophore
indicating chromatin: chromatolysis
Word Origin
from Greek khrōma, khrōmat- colour
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
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Word Origin and History for chromato-

before vowels chromat-, word forming element indicating "color; chromatin," from Latinized form of Greek khromato-, from khroma (see chroma).

Online Etymology Dictionary, © 2010 Douglas Harper
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chromato- in Medicine

chromato- or chromat-

  1. Color: chromatophore.

  2. Chromatin: chromatolysis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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