单词	ectotherm
释义	ectotherm noun ec·​to·​therm ˈek-tə-ˌthərm  : a cold-blooded animal : poikilotherm ectothermic ˌek-tə-ˈthər-mik  adjective Example Sentences Recent Examples on the Web Fish are ectotherms, which means their body temperature relies very much on the temperature of the water around them. Jacqueline Detwiler, Popular Mechanics, 10 Dec. 2018 Because reptiles are ectotherms, their body temperature is controlled by whatever’s around them, says Refsnider. Jason Bittel, National Geographic, 20 June 2017 Word History First Known Use 1940, in the meaning defined above Medical Definition ectotherm noun ec·​to·​therm ˈek-tə-ˌthərm  : a cold-blooded animal : poikilotherm
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