Isotherm

Isotherm may refer to:
 * Isotherm (contour line) – 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
 * Moisture sorption isotherm – a curve giving the functional relationship between humidity and equilibrium water content of a material for a constant temperature
 * Sorption isotherm – a curve giving the functional relationship between adsorbate and adsorbent in a constant-temperature adsorption process

Izotermický děj