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
Recent Examples of isotherm from the Web
Both locations sit at something called a zero degree isotherm, where the average air temperature hovers right around the freezing point of water.
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Origin and Etymology of isotherm
French isotherme, adjective
First Known Use: 1859See Words from the same year
Medical Definition of isotherm
: a line on a chart representing changes of volume or pressure under conditions of constant temperature
Learn More about isotherm
Britannica.com: Encyclopedia article about isotherm
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