Definition of poikilotherm
: an organism (as a frog) with a variable body temperature that tends to fluctuate with and is similar to or slightly higher than the temperature of its environment : a cold-blooded organism
Origin of poikilotherm
Greek poikilos variegated + International Scientific Vocabulary -therm — more at paint
First Known Use: 1920
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Medical Dictionary: Definition of "poikilotherm"
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