Ho*moi`o*ther"mal (?), a. [Gr. &?; like + E. thermal.] (Physiol.) Maintaining a uniform temperature; hæmatothermal; homothermic; -- applied to warm- bodied animals, because they maintain a nearly uniform temperature in spite of the great variations in the surrounding air; in distinct from the cold-blooded (poikilothermal) animals, whose body temperature follows the variations in temperature of the surrounding medium.