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auxochrome

[awk-suh-krohm]

noun Chemistry.

any radical or group of atoms that intensifies the color of a substance.

Origin:
1890–95; auxo- + chrome

Related forms

aux·o·chrom·ic, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Auxochrome is always a great word to know.

So is ethereal. Does it mean:

pertaining to, containing, or resembling ethyl ether

a preparation containing an insoluble dye converted by reduction into a soluble leuco base, or a vessel containing such a preparation

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Collins

World English Dictionary

auxochrome (ˈɔːksəˌkrəʊm)

—n
	a group of atoms that can be attached to a chromogen to convert it into a dye

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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auxochrome

aux·o·chrome