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poi·ki·lo·therm 'pȯi-ki-lə-.thərm, (.)pȯi-'kil-ə- n an organism (as a frog) with a variable body temperature that is usu. slightly higher than the temperature of its environment: a cold-blooded organism called also heterotherm
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poi·ki·lo·therm (poi-kilґo-thurm″) [poikilo- + Gr. thermē heat] 1. an animal that exhibits poikilothermy; a so-called cold-blooded animal. 2. ectotherm.Medical dictionary. 2011.