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[ek-tuh-thurm] /ˈɛk təˌθɜrm/
noun, Zoology
a cold-blooded animal.
Origin of ectotherm
1940-45; ecto- + therm
Related forms
ectothermic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ectothermic
  • So far, these revisionists have found, all the studies suggest that dinosaurs should go back to the ectothermic fold.
  • Because reptiles are ectothermic, or cold-blooded, their body temperature varies with environmental conditions.
  • Because the desert tortoise is ectothermic, it controls its body temperature by using a burrow.
  • Rattlesnakes are cold-blooded or ectothermic animals.
  • Reptiles and amphibians are ectothermic, meaning their body temperature is controlled by their surroundings.
ectothermic in Medicine

ectothermic (ěk'tə-thûr'mĭk) or ec·to·ther·mal (-məl) or ec·to·ther·mous (-məs)
Of or relating to an organism that regulates its body temperature largely by exchanging heat with its surrounding environment.

ectotherm ec·to·therm (ěk'tə-thûrm')
An organism that regulates its body temperature largely by exchanging heat with its surroundings; a poikilotherm.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ectothermic in Science
A cold-blooded organism. Also called poikilotherm.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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