ho·me·o·therm 
(hōmē-ə-thûrm′) also ho·moi·o·therm (hō-moiə-)
(hōmē-ə-thûrm′) also ho·moi·o·therm (hō-moiə-)n.
An organism, such as a mammal or bird, having a body temperature that is constant and largely independent of the temperature of its surroundings.
ho′me·o·thermi·a (-thûrmē-ə), home·o·ther′my (-thûr′mē) n.
ho′me·o·thermic (-mĭk) adj.