isotherm

I1S1O1T1H4E1R1M3
UK/ˈaɪ.səʊˌθɜː(ɹ)m/

noun

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

Similar
thermoisopleth
OriginFrench isotherme ← Ancient Greek ἴσος →
UncommonScrabble 13
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Meanings

nounisotherm (plural isotherms)

plural isotherms

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

    Synonyms: thermoisopleth

Synonyms & antonyms

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

Similar
thermoisopleth

Origin

  1. Ancient Greekἴσος“equal”
  2. Frenchisotherme“of equal temperature”
  3. Englishisotherm

From the French isotherme (“of equal temperature”, adjective), itself from Ancient Greek ἴσος (ísos, “equal”) + θέρμη (thérmē, “warmth”). By surface analysis, iso- + -therm.

More words from French, Ancient Greek

Full word history & related roots →

Translations

Chinese Mandarin 等溫線 /等温线
  • 等溫線 /等温线 (děngwēnxiàn)line representing equal temperature
Czech izoterma
  • izotermaline representing equal temperature
Dutch isotherm
  • isothermline representing equal temperature
Esperanto izotermo
  • izotermoline representing equal temperature
Estonian isoterm, samasoojusjoon
  • isotermline representing equal temperature
  • samasoojusjoonline representing equal temperature
Finnish isotermi, lämpökäyrä
  • isotermiline representing equal temperature
  • lämpökäyräline representing equal temperature
German Isotherme
  • Isothermeline representing equal temperature
Greek ισόθερμος
  • ισόθερμος (isóthermos)line representing equal temperature
Irish isiteirm
  • isiteirmline representing equal temperature
Italian isoterma
  • isotermaline representing equal temperature
Latvian izoterma
  • izotermaline representing equal temperature
Lithuanian izotermė
  • izotermėline representing equal temperature
Polish izoterma
  • izotermaline representing equal temperature
Portuguese isoterma
  • isotermaline representing equal temperature
Russian изоте́рма
  • изоте́рма (izotérma)line representing equal temperature
Tagalog kakaintan
  • kakaintanline representing equal temperature

Rhymes & wordplay

Anagrams

theorismHomerist
Cite this entry
APA

isotherm. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/isotherm

MLA

“isotherm.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/isotherm. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “isotherm,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/isotherm.

Source: isotherm on Wiktionary, CC BY-SA 4.0.