heterochromosome

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het·er·o·chro·mo·some

 (hĕt′ə-rō-krō′mə-sōm′)
n.
A sex chromosome.
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.

heterochromosome

(ˌhɛtərəʊˈkrəʊməˌsəʊm)
n
1. (Biology) an atypical chromosome, esp a sex chromosome
2. (Biology) a chromosome composed mainly of heterochromatin
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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The boxes are filled with three to five colors of impatiens, lobelia, and sweet allosome. "The impatiens give the building a sophisticated appearance," says Nickel.