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mitosis

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mi⋅to⋅sis

[mahy-toh-sis]
–noun Cell Biology.
the usual method of cell division, characterized typically by the resolving of the chromatin of the nucleus into a threadlike form, which condenses into chromosomes, each of which separates longitudinally into two parts, one part of each chromosome being retained in each of two new cells resulting from the original cell.
Compare meiosis.


Origin:
1885–90; < Gk mít(os) a thread + -osis


mi⋅tot⋅ic [mahy-tot-ik] , adjective
mi⋅tot⋅i⋅cal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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mi·to·sis   (mī-tō'sĭs)   


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n.   pl. mi·to·ses (-sēz) Biology
  1. The process in cell division by which the nucleus divides, typically consisting of four stages, prophase, metaphase, anaphase, and telophase, and normally resulting in two new nuclei, each of which contains a complete copy of the parental chromosomes. Also called karyokinesis.

  2. The entire process of cell division including division of the nucleus and the cytoplasm.


[Greek mitos, warp thread + -osis.]
mi·tot'ic (-tŏt'ĭk) adj., mi·tot'i·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

mitosis [(meye-toh-sis)]

Division of a single cell into two identical “daughter” cells. Each daughter cell has an identical number of chromosomes as the parent cell. Mitosis begins when the DNA in the parent cell replicates itself; it ends with two cells having the same genes (see genetics). Most cells in the human body, and all single-celled organisms, reproduce through mitosis. (Compare meiosis.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

mitosis 
1887, coined from Gk. mitos "warp thread" (see miter (1)) + Mod.L. -osis "act, process." Term introduced by Ger. anatomist Walther Fleming (1843-1905) in 1882. So called because chromatin of the cell nucleus appears as long threads in the first stages.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: mi·to·sis
Pronunciation: mI-'tO-s&s
Function: noun
Inflected Form: plural mi·to·ses /-"sEz/
1 : a process that takes place in the nucleus of a dividing cell, involves typically a series of steps consisting of prophase, metaphase, anaphase, and telophase, and results in theformation of two new nuclei each having the same number of chromosomes as the parent nucleus —compare MEIOSIS
2 : cell division in which mitosis occurs —mi·tot·ic /-'tät-ik/ adjectivemi·tot·i·cal·ly /-i-k(&-)lE/ adverb
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

mitosis mi·to·sis (mī-tō'sĭs)
n. pl. mi·to·ses (-sēz)

  1. The process in cell division by which the nucleus divides, typically in four stages (prophase, metaphase, anaphase, and telophase) resulting in two new nuclei, each of which has exactly the same chromosome and DNA content as the original cell. Also called indirect nuclear division, karyokinesis, mitotic division.

  2. The entire process of cell division including division of the nucleus and the cytoplasm.


mi·tot'ic (-tŏt'ĭk) adj.
mi·tot'i·cal·ly adv.

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