Etymograph

English

endothermic

Endothermic comes from French endothermique.

  1. Frenchc. 1600–presentendothermique
  2. Englishearliest quotation 2014endothermic

attested reconstructed ? uncertain or disputed

Lineage

  1. Frenchc. 1600–presentendothermique
  2. Englishearliest quotation 2014endothermic

Earliest quotation: 2014, William J. Brock, Barbara Mounho: “These can be differentiated on a thermal scan where…”

Equivalent to endo- + -thermic

Proto-Indo-European *h₁n̥dóm ‘inside’

Proto-Hellenic *éndon

Ancient Greek ἔνδον ‘inner’

English endo-

Today it means

adj Of a chemical reaction that absorbs heat energy from its surroundings.

Language periods are conventional ranges, not dates for this word.

Etymograph / French endothermique / endothermic