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poikilothermic poi·ki·lo·ther·mic (poi'kə-lō-thûr'mĭk) or poi·ki·lo·ther·mal (-məl) or poi·ki·lo·ther·mous (-məs)
Of or relating to an organism having a body temperature that varies with the temperature of its surroundings; cold-blooded.
Capable of existing and growing in media of varying temperatures.