or poi·ki·lo·ther·mal

[ poi-kuh-loh-thur-mik, poi-kil-uh- ]
/ ˌpɔɪ kə loʊˈθɜr mɪk, pɔɪˌkɪl ə- /

adjective Zoology.

Origin of poikilothermic

1880–85; < Greek poikílo(s) various + thermic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for poikilothermic


poikilothermal (ˌpɔɪkɪləʊˈθɜːməl)

/ (ˌpɔɪkɪləʊˈθɜːmɪk) /


(of all animals except birds and mammals) having a body temperature that varies with the temperature of the surroundingsCompare homoiothermic

Derived forms of poikilothermic

poikilothermism 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

Medicine definitions for poikilothermic

[ poi′kə-lō-thûrmĭk ]


Of or relating to an organism having a body temperature that varies with the temperature of its surroundings; cold-blooded.
Capable of existing and growing in media of varying temperatures.

Other words from poikilothermic

poi′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.