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nondisjunction

American  
[non-dis-juhngk-shuhn] / ˌnɒn dɪsˈdʒʌŋk ʃən /

noun

Biology.

  1. the failure of chromosomes to separate and segregate into daughter cells at division.

nondisjunction British  
/ ˌnɒndɪsˈdʒʌŋkʃən /

noun

  1. the failure of paired homologous chromosomes to move to opposite poles of the cell during meiosis

"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

Etymology

Origin of nondisjunction

First recorded in 1910–15; non- + disjunction

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.