isotherm
iso·therm
noun \ˈī-sə-ˌthərm\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
See Origin of ISOTHERM
French isotherme, adjective
First Known Use: 1859
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