Isotherm may refer to:
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Isotherm (contour line)
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional gra ...
a type of equal temperature at a given date or time on a geographic map
* Isotherm in thermodynamics, a curve on a P-V diagram for an
isothermal process
In thermodynamics, an isothermal process is a type of thermodynamic process in which the temperature ''T'' of a system remains constant: Δ''T'' = 0. This typically occurs when a system is in contact with an outside thermal reservoir, and ...
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Moisture sorption isotherm
At equilibrium, the relationship between water content and equilibrium relative humidity of a material can be displayed graphically by a curve, the so-called moisture sorption isotherm.
For each humidity value, a sorption isotherm indicates the c ...
a curve giving the functional relationship between humidity and equilibrium water content of a material for a constant temperature
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Sorption isotherm
Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a ...
a curve giving the functional relationship between adsorbate and adsorbent in a constant-temperature adsorption process
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