ectotherm
/ˈɛktoʊˌθɜrm/
noun
- An animal that relies on external sources, such as the sun, to regulate its body temperature; a cold-blooded animal.
- As an ectotherm, a snake's activity level depends on the temperature of its surroundings.
- Lizards are classic ectotherms that bask on rocks to warm up.
- Many fish are ectotherms, so their body temperature changes with the water around them.
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