endothermic

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

• IPA^(key): /ˌɛndəʊˈθəːmɪk/

• Audio (Southern England):

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endothermic (comparative more endothermic, superlative most endothermic)

1. (chemistry) Of a chemical reaction that absorbs heat energy from its surroundings.

   Antonym: exothermic

   • 2014, William J. Brock, Barbara Mounho, Lijie Fu, The Role of the Study Director in Nonclinical Studies, page 174:

     These can be differentiated on a thermal scan where an endothermic transition indicates enantiotropes and an exothermic transition indicates monotropes .

2. (zoology) Of an animal whose body temperature is regulated by internal factors.

   Synonyms: warm-blooded, endothermal, homeothermal, homeothermic

   Antonyms: ectothermic, exothermic, cold-blooded