Mesotherm
A mesotherm (Greek, 'meso' = intermediate; 'thermē' = heat) is a type of animal with a thermoregulatory strategy intermediate to 'cold-blooded' ectotherms and 'warm-blooded' endotherms. Mesotherms have two basic characteristics: 1. Elevation of body temperature via metabolic production of heat. 2. Weak or absent metabolic control of a particular body temperature.