• synonyms


[am-i-toh-sis, ey-mahy-]
noun Biology.
  1. the direct method of cell division, characterized by simple cleavage of the nucleus without the formation of chromosomes.
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Origin of amitosis

First recorded in 1890–95; a-6 + mitosis
Related formsam·i·tot·ic [am-i-tot-ik, ey-mahy-] /ˌæm ɪˈtɒt ɪk, ˌeɪ maɪ-/, adjectiveam·i·tot·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for amitotic

Historical Examples of amitotic

  • In a typical direct, or amitotic, division the nucleus is constricted in the middle and divides into two daughter-nuclei.

    The Ethics of Medical Homicide and Mutilation

    Austin O'Malley

British Dictionary definitions for amitotic


  1. an unusual form of cell division in which the nucleus and cytoplasm divide by constriction without the formation of chromosomes; direct cell division
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Derived Formsamitotic (ˌæmɪˈtɒtɪk), adjectiveamitotically, adverb

Word Origin for amitosis

C19: a- 1 + mitosis
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

amitotic in Medicine


(ăm′ĭ-tōsĭs, ā′mī-)
  1. Direct cell division by simple cleavage of the nucleus, without spindle formation or the appearance of chromosomes.direct nuclear division
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Related formsam′i•totic (-tŏtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.