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pleomorphism

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ple⋅o⋅mor⋅phism

  [plee-uh-mawr-fiz-uhm]
Use pleomorphism in a Sentence
–noun Biology.
existence of an organism in two or more distinct forms during the life cycle; polymorphism.
Also, ple⋅o⋅mor⋅phy.

Origin:
1860–65; pleo- + -morph + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ple·o·mor·phism   (plē'ə-môr'fĭz'əm)   
n.  

  1. Chemistry See polymorphism.

  2. Biology The occurrence of two or more structural forms during a life cycle, especially of certain plants.

ple'o·mor'phic adj.
pol·y·mor·phism   (pŏl'ē-môr'fĭz'əm)   
n.  

  1. Biology The occurrence of different forms, stages, or types in individual organisms or in organisms of the same species, independent of sexual variations.

  2. Chemistry Crystallization of a compound in at least two distinct forms. Also called pleomorphism.

pol'y·mor'phic, pol'y·mor'phous adj., pol'y·mor'phous·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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Medical Dictionary

Main Entry: pleo·mor·phism
Pronunciation: "plE-&-'mor-"fiz-&m
Function: noun
: the quality or state of having or assuming various forms : POLYMORPHISM
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

pleomorphism ple·o·mor·phism (plē'ə-môr'fĭz'əm)
n.

  1. See polymorphism.

  2. The occurrence of two or more structural forms during a life cycle, especially of certain plants.

ple'o·mor'phic (-fĭk) or ple'o·mor'phous (-fəs) adj.

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

pleomorphism

the existence of irregular and variant forms in the same species or strain of microorganisms, a condition analogous to polymorphism in higher organisms. Pleomorphism is particularly prevalent in certain groups of bacteria and in yeasts, rickettsias, and mycoplasmas and greatly complicates the task of identifying and studying them.

Learn more about pleomorphism with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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