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proliferation

[pruh-lif-uh-rey-shuh n] /prəˌlɪf əˈreɪ ʃən/
noun
1.
the growth or production of cells by multiplication of parts.
2.
a rapid and often excessive spread or increase:
nuclear proliferation.
Origin of proliferation
1855-1860
1855-60; proliferate + -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for proliferation

proliferation

/prəˌlɪfəˈreɪʃən/
noun
1.
rapid growth or reproduction of new parts, cells, etc
2.
rapid growth or increase in numbers
3.
a great number: done up in a proliferation of fancy frills
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
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Word Origin and History for proliferation
n.

1859, "formation or development of cells," from French prolifération, from prolifère "producing offspring," from Latin proles "offspring" (see prolific) + ferre "to bear" (see infer). Meaning "enlargement, extension, increase" is from 1920; especially of nuclear weapons (1966).

Online Etymology Dictionary, © 2010 Douglas Harper
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proliferation in Medicine

proliferation pro·lif·er·a·tion (prə-lĭf'ə-rā'shən)
n.
The growth and reproduction of similar cells.

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