poikilotherm

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poi·kil·o·therm

 (poi-kĭl′ə-thûrm′)
n.
An organism, such as a fish or reptile, having a body temperature that varies with the temperature of its surroundings.

[Greek poikilos, spotted, various; see peig- in Indo-European roots + -therm.]

poi′ki·lo·ther′mi·a (-thûr′mē-ə), poi′ki·lo·ther′my (-thûr′mē) n.
poi′ki·lo·ther′mic (-mĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

poikilotherm

(ˌpɔɪkɪləʊˈθɜːm)
n
(Animals) an organism with poikilothermic qualities
adj
(Zoology) a variant form of poikilothermic
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.poikilotherm - an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement
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