• synonyms


noun Cell Biology.
  1. Also called chromocenter. any of several masses of chromatin in the reticulum of a cell nucleus.
  2. a chromosome.
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Origin of karyosome

First recorded in 1885–90; karyo- + -some3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for karyosome

Historical Examples

  • Each ♀ merozoite has a chromatic nucleus (n) without a karyosome.

    Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5


British Dictionary definitions for karyosome


  1. any of the dense aggregates of chromatin in the nucleus of a cell
  2. the nucleus of a cell
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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

karyosome in Medicine


  1. An aggregation of chromatin in the nucleus of a cell not undergoing mitosis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.