ECTOTHERM

poikilotherm, ectotherm

(noun) an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals

Source: WordNet® 3.1

Etymology

Noun

ectotherm (plural ectotherms)

(biology) An animal, such as an amphibian, fish, reptile, or arthropod, which has a limited ability to regulate its body temperature and whose body temperature thus depends on the ambient temperature.

Source: Wiktionary

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