The Collaborative International Dictionary of English v.0.48:

Homothermic \Ho`mo*ther"mic\, Homothermous \Ho`mo*ther"mous\, a.
   [Homo- + Gr. ? heat.] (Physiol.)
   Warm-blooded; homoiothermal; h[ae]matothermal.
   [1913 Webster]