poikilothermic poikilothermous heterothermic ectothermic
poikilothermic%5:00:00:cold-blooded:00 poikilothermous%5:00:00:cold-blooded:00 heterothermic%5:00:00:cold-blooded:00 ectothermic%5:00:00:cold-blooded:00
of animals except birds and mammals; having body temperature that varies with the environment