ectothermic
/ˌɛktoʊˈθɜrmɪk/
adjective
- Describing an animal that depends on outside heat sources to control its body temperature; cold-blooded.
- Turtles are ectothermic reptiles that need sunlight to stay active.
- In ectothermic animals, metabolism slows down when the environment gets cold.
- The aquarium's ectothermic fish became sluggish when the heater broke.
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