[am-i-toh-sis, ey-mahy-]

noun Biology.

the direct method of cell division, characterized by simple cleavage of the nucleus without the formation of chromosomes.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for amitotic

Historical Examples of amitotic

British Dictionary definitions for amitotic



an unusual form of cell division in which the nucleus and cytoplasm divide by constriction without the formation of chromosomes; direct cell division
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-]


Direct cell division by simple cleavage of the nucleus, without spindle formation or the appearance of nuclear division
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.