| 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-blood·ed (wôrm'blŭd'ĭd) adj.
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warm-blooded adj.
Maintaining a relatively constant and warm body temperature independent of environmental temperature; homeothermic.