Definition of isotherm in English:

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Pronunciation: /ˈīsəˌTHərm/
Pronunciation: /ˈīsōˌTHərm/


1A line on a map connecting points having the same temperature at a given time or on average over a given period.
Example sentences
  • Humboldt used lines, called isotherms, to delineate regions of equal temperatures.
  • Put differently, isotherms are as important as latitudes in determining what constitutes Arctic and Subarctic regions.
  • The Curie isotherm is a temperature surface in the Earth's subsurface connecting depths at which Curie temperatures are reached.
1.1 Physics A curve on a diagram joining points representing states or conditions of equal temperature.
Example sentences
  • The corresponding surface tension isotherms in the case of high lipid concentration are presented in Fig.7.
  • This is consistent with the S shape of isotherms in all numerical models simulating temperature evolution in subduction zones.
  • All data points in the adsorption isotherm represent an average of three experiments.



Pronunciation: /ˌīsəˈTHərm(ə)l/
adjective& noun
Example sentences
  • These solid-solution mixtures were placed in Erlenmeyer flasks and agitated in an isothermal shaker for 24 hr.
  • For many biological applications, it is equally relevant to consider the phase behavior at varying osmotic pressures under isothermal conditions.
  • Transcription mediated amplification is also an isothermal assay that targets either DNA or RNA but generates RNA as its amplified product.


Pronunciation: /ˌīsəˈTHərməlē/
Example sentences
  • To eliminate the physisorbed water, the sample (5-6 mg in an Al pan) was initially kept isothermally at 25°C under a constant flux of N 2.
  • Hedgecock and RUSSELL reported that well-fed animals migrate to their cultivation temperature and move isothermally and that this thermotaxis behavior is modified by two kinds of experience.
  • The SP - 2330 column was run isothermally at 180°C.


Mid 19th century: from French isotherme, from Greek isos 'equal' + thermē 'heat'.

For editors and proofreaders

Syllabification: i·so·therm

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