Isotherm

//ˈaɪ.səʊˌθɜː(ɹ)m// noun

Definitions

Noun
  1. 1
    A line on a graph or chart, such as a weather map, along which all the points have the same temperature.
  2. 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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