en·do·ther·mic 
(ĕn′dō-thûrmĭk) also en·do·ther·mal (-məl)
(ĕn′dō-thûrmĭk) also en·do·ther·mal (-məl)adj.
1. Chemistry Characterized by or causing the absorption of heat; endoergic.
2. Biology Of or relating to an organism that generates heat to maintain its body temperature, typically above the temperature of its surroundings; warm-blooded.
endo·ther′my n.