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en·do·ther·mic(ĕn′dō-thûr′mĭk) also en·do·ther·mal (-məl)
1. Chemistry Characterized by or causing the absorption of heat; endoergic.
2. Biology Of or relating to an organism that generates heat to maintain its body temperature, typically above the temperature of its surroundings; warm-blooded.
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.
(Zoology) zoology a system of temperature control whereby an animal generates heat internally
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014