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isochromosome

[ ī′sə-krōmə-sōm′ ]
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n.
A chromosomal aberration in which two daughter chromosomes are formed, each lacking one chromosome arm but with the other arm doubled.
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The rainy weather could not ________ my elated spirits on my graduation day.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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