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ectotherm

 
Dictionary: ec·to·therm   (ĕk'tə-thûrm') pronunciation
n.
An organism that regulates its body temperature largely by exchanging heat with its surroundings; a poikilotherm.


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Any so-called cold-blooded animal; that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates. The body temperatures of aquatic ectotherms are usually very close to those of the water. Ectotherms do not require as much food as warm-blooded animals (endotherms) of the same size, but most cannot deal as well with cold surroundings.

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Medical Dictionary: ec·to·therm
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(ĕk'tə-thûrm')
n.

An organism that regulates its body temperature largely by exchanging heat with its surroundings; a poikilotherm.

 
 
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poikilotherm
Endotherm
Hibernation (physiology)

Is a fish ectothermic? Read answer...
Are ectotherms vertebrates? Read answer...
What is the definition to ectotherm? Read answer...

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Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.  Read more
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Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company Read more