ho·me·o·therm (hō'mē-ə-thûrm') 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; an endotherm. ho'me·o·ther'mi·a (-thûr'mē-ə) n., ho'me·o·ther'mic (-mĭk) adj.
homeothermic ho·me·o·ther·mic (hō'mē-ə-thûr'mĭk) or ho·moi·o·ther·mic (hō-moi'ə-) adj. Maintaining a relatively constant body temperature that is independent of the temperature of the surrounding environment.