Source : Webster's Revised Unabridged Dictionary (1913)

Homothermic \Ho`mo*ther"mic\, Homothermous \Ho`mo*ther"mous\, a.
   [Homo- + Gr. ? heat.] (Physiol.)
   Warm-blooded; homoiothermal; h[ae]matothermal.

Source : WordNet®

homothermic
     adj : of birds and mammals; having constant and relatively high
           body temperature [syn: {homoiothermic}, {homeothermic}]