Isotherm
//ˈaɪ.səʊˌθɜː(ɹ)m// noun
noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 A line on a graph or chart, such as a weather map, along which all the points have the same temperature.
- 2 (meteorology) an isogram connecting points having the same temperature at a given time wordnet
Etymology
From the French isotherme (“of equal temperature”, adjective), itself from Ancient Greek ἴσος (ísos, “equal”) + θέρμη (thérmē, “warmth”). By surface analysis, iso- + -therm.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.