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ectotherm
(redirected from poikilotherm)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson 0.27 sec.

ectotherm

Any so-called cold-blooded animal; that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates. The body temperatures of aquatic ectotherms are usually very close to those of the water. Ectotherms do not require as much food as warm-blooded animals (endotherms) of the same size, but most cannot deal as well with cold surroundings.



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Food web magnification of persistent organic pollutants in poikilotherms and homeotherms from the Barents Sea, Environ.
Although our experiments on frogs have all been conducted at room temperature (near the high end of the normal range of temperatures for free-ranging bullfrogs) and we traumatized equally both limbs of each animal and statistically compared treated limbs with untreated limbs, bullfrogs are poikilotherms (cold-blooded) and may therefore respond differently from homeothermic (warm-blooded) mammals to trauma and to treatment.
 
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