ectotherm

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Related to ectothermy: exothermic

ec·to·therm

(ĕk′tə-thûrm′)

An organism that depends on external sources for its body heat.

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.

ectotherm

(ˈɛktəʊˌθɜːm)

an animal whose body temperature is determined by ambient temperature, and hence any animal except birds and mammals

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ec•to•therm

(ˈɛk təˌθɜrm)

n.

a cold-blooded animal.

[1940–45]

ec`to•ther′mic, adj.

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Noun

ectotherm - an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals

poikilotherm

animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement

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ectotherme

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Further, patterns of variation in metabolic efficiencies between modes (endothermy and ectothermy) have been considered in the context of the trophic structure of ecological networks (e.g, Riede et al., 2011; Moore and de Ruiter, 2012).

Revisiting the energetic efficiency hypothesis: body mass, metabolism, and food chain length

Scientists define these different strategies as "endothermy" (endo for inside; therm for heat) and "ectothermy".