| 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. |

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