| a. | 1. | (Physiol.) Having warm blood; - applied especially to those animals, as birds and mammals, which have warm blood, or, more properly, the power of maintaining a nearly uniform temperature whatever the temperature of the surrounding air. See Homoiothermal. |
| Adj. | 1. | warm-blooded - having warm blood (in animals whose body temperature is internally regulated) Antonyms: cold-blooded - having cold blood (in animals whose body temperature is not internally regulated) |