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heterochromatin

[het-er-uh-kroh-muh-tin] /ˌhɛt ər əˈkroʊ mə tɪn/
noun, Genetics.
1.
the dense, highly stainable part of a chromosome.
Compare euchromatin.
Origin
1930-1935
1930-35; hetero- + chromatin
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for heterochromatin

heterochromatin

/ˌhɛtərəʊˈkrəʊmətɪn/
noun
1.
the condensed part of a chromosome that stains strongly with basic dyes in nondividing cells and has little genetic activity Compare euchromatin
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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heterochromatin in Medicine

heterochromatin het·er·o·chro·ma·tin (hět'ə-rō-krō'mə-tĭn)
n.
The part of the chromonema that remains tightly coiled and condensed during interphase and thus stains readily.

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