You searched for: “isotherm
isotherm
1. Having the same temperature.
2. Of, pertaining to, indicating, or corresponding to equal temperatures.
3. Occurring at a constant temperature; pertaining to or involving a constancy of temperature with time.
4. A line connecting points having the same temperature in a vertical section of any part of the sea.
5. A line on a graph showing the relationship between variables, especially pressure and volume, at a constant temperature.