homeothermy

noun
ho·​meo·​ther·​my | \ ˈhō-mē-ə-ˌthər-mē How to pronounce homeothermy (audio) \
variants: also homoiothermy \ hō-​ˈmȯi-​ə-​ How to pronounce homoiothermy (audio) \
plural homeothermies

Medical Definition of homeothermy

: the condition of being warm-blooded : warm-bloodedness

called also homeothermism