n.
The condensed, inactive X-chromosome found in the nuclei of somatic cells of most female mammals. Also called sex chromatin.
[After Murray Llewellyn Barr (1908-1995), Canadian anatomist.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
