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Definition of isotherm
1 : a line on a map or chart of the earth's surface connecting points having the same temperature at a given time or the same mean temperature for a given period
2 : a line on a chart representing changes of volume or pressure under conditions of constant temperature
From the M-W Editors
Recent Examples of isotherm from the Web
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Both locations sit at something called a zero degree isotherm, where the average air temperature hovers right around the freezing point of water.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'isotherm'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of isotherm
French isotherme, adjective
Medical Dictionary
isotherm
playMedical Definition of isotherm
: a line on a chart representing changes of volume or pressure under conditions of constant temperature
Learn More about isotherm
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Britannica.com: Encyclopedia article about isotherm
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