# endothermic

> English word · Adjective · IPA /ˌɛndəʊˈθəːmɪk/ · frequency rank #89,328

## Definitions
1. Of a chemical reaction that absorbs heat energy from its surroundings.
2. Of an animal whose body temperature is regulated by internal factors.

## Etymology
Borrowed from French endothermique, from endo- (“inside”) + thermique (“of heat”), both ultimately from Ancient Greek. By surface analysis, endo- + -thermic.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/endothermic