adj · noun · 4 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˌɛndəʊˈθəːmɪk/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:EH2 N D OW0 TH ER1 M IH0 K
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Of a chemical reaction that absorbs heat energy from its surroundings.
Definition source: English Wiktionary via Wiktextract
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
adjective
Meaning 4
(of a chemical reaction or compound) occurring or formed with absorption of heat
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: endothermal, heat-absorbing
Antonyms: exothermic
History
Etymology
Borrowed from French endothermique, from endo- (“inside”) + thermique (“of heat”), both ultimately from Ancient Greek. By surface analysis, endo- + -thermic.
Across languages
Translations
44 source translations are retained for this English entry.