warm-blooded

[wawrm-bluhd-id]
adjective
1.
Also, endothermic. designating or pertaining to animals, as mammals and birds, whose blood ranges in temperatures from about 98° to 112°F (37° to 44°C) and remains relatively constant, irrespective of the temperature of the surrounding medium; homoiothermal.
2.
ardent, impetuous, or passionate: young and warm-blooded valor.

Origin:
1785–95

warm-bloodedness, noun
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World English Dictionary
warm-blooded
 
adj
1.  ardent, impetuous, or passionate
2.  Technical name: homoiothermic (of birds and mammals) having a constant body temperature, usually higher than the temperature of the surroundings
 
warm-'bloodedness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

warm-blooded adj.
Maintaining a relatively constant and warm body temperature independent of environmental temperature; homeothermic.


warm'-blood'ed·ness n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
warm-blooded   (wôrm'blŭd'ĭd)  Pronunciation Key 
Having a relatively warm body temperature that stays about the same regardless of changes in the temperature of the surroundings. Birds and mammals are warm-blooded.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Some live exclusively on warm-blooded animals, on mammals, or birds.
Outside of the lab, nothing is quite so miserable for a warm-blooded creature
  as a polar winter.
Block is among the world's leading experts on warm-blooded ocean fish- tuna,
  mackerel sharks and billfishes such as marlin.
Both tunas and billfishes are among a handful of fish that are partially
  warm-blooded.
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