Endotherm

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Science and technology

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What Wikipedia says

An endotherm (from Greek ἔνδον endon "within" and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal bodily functions instead of relying almost purely on ambient heat.

Excerpt from the Wikipedia article “Endotherm”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Arno / Coen, CC BY-SA 3.0, via Wikimedia Commons.