Definitions

1. noun

A line or curve on a graph of temperature versus distance, or other variables, indicating a constant temperature.

“The geologist studied the isotherm on the map to understand the thermal gradient of the region.”

2. noun

A line or curve showing the relationship between two variables at a constant temperature.

“The engineer plotted the isotherm on the graph to analyze the heat transfer process.”

3. noun

In a thermodynamic context, an isotherm is a curve that represents a constant temperature.

“The physicist used the isotherm to derive the thermodynamic properties of the system.”