noun Genetics.

the part of a chromosome that condenses maximally during metaphase and contains most of the genetically active material.

Nearby words

  1. euchologion,
  2. euchology,
  3. euchre,
  4. euchred,
  5. euchromatic,
  6. euchromosome,
  7. eucken,
  8. euclase,
  9. euclid,
  10. euclidean

Origin of euchromatin

First recorded in 1930–35; eu- + chromatin

Related formseu·chro·mat·ic [yoo-kruh-mat-ik] /ˌyu krəˈmæt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for euchromatin



the part of a chromosome that constitutes the major genes and does not stain strongly with basic dyes when the cell is not dividingCompare heterochromatin
Derived Formseuchromatic (ˌjuːkrəʊˈmætɪk), adjective

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

Medicine definitions for euchromatin




Chromosomal material that consists of uncoiled dispersed threads during interphase, is genetically active, and stains lightly with basic dyes.

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