ectotherm

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ectotherm (poikilotherm) An animal that maintains its body temperature by absorbing heat from the surrounding environment. All animals except mammals and birds are ectotherms; they are often described as being cold-blooded and are unable to regulate their body temperature metabolically. See poikilothermy. Compare endotherm; heterotherm.

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ectotherm An animal that maintains its body temperature within fairly narrow limits by behavioural means (e.g. basking or seeking shade). Terrestrial reptiles are ectotherms. Compare poikilotherm.

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ectotherm An animal that maintains its body temperature within fairly narrow limits by behavioural means (e.g. basking or seeking shade). Terrestrial reptiles are ectotherms. Compare POIKILOTHERM.

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ectotherm See HOMOIOTHERM.