- 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.
- ardent, impetuous, or passionate: young and warm-blooded valor.
Origin of warm-blooded
First recorded in 1785–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for warm-blooded
Both feed on warm-blooded animals, and neither will eat carrion.The Young Voyageurs
The whale is a warm-blooded animal; the fish is cold-blooded.Fighting the Whales
They seemed to have forgotten that all the warm-blooded animals, except man, must necessarily drink cold water.
But there were a few, small, struggling, warm-blooded animals.Inside John Barth
William W. Stuart
This action is noticed in cold as well as in warm-blooded animals.Poisons: Their Effects and Detection
Alexander Wynter Blyth
- ardent, impetuous, or passionate
- (of birds and mammals) having a constant body temperature, usually higher than the temperature of the surroundingsTechnical name: homoiothermic
- Maintaining a relatively constant and warm body temperature independent of environmental temperature; homeothermic.
- 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.