• synonyms


or poi·ki·lo·ther·mal

[poi-kuh-loh-thur-mik, poi-kil-uh-]
adjective Zoology.
  1. cold-blooded(def 1) (opposed to homoiothermal).
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Origin of poikilothermic

1880–85; < Greek poikílo(s) various + thermic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for poikilothermic


poikilothermal (ˌpɔɪkɪləʊˈθɜːməl)

  1. (of all animals except birds and mammals) having a body temperature that varies with the temperature of the surroundingsCompare homoiothermic
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Derived Formspoikilothermism or poikilothermy, noun

Word Origin for poikilothermic

C19: from Greek poikilos various + thermal
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

poikilothermic in Medicine


  1. Of or relating to an organism having a body temperature that varies with the temperature of its surroundings; cold-blooded.
  2. Capable of existing and growing in media of varying temperatures.
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Related formspoi′ki•lo•thermi•a null n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.