triple point

noun, Physics.
1.
the particular temperature and pressure at which the solid, liquid, and gaseous phases of a given substance are all at equilibrium with one another.
Origin
1870-75
British Dictionary definitions for triple point

triple point

noun
1.
(chem) the temperature and pressure at which the three phases of a substance are in equilibrium. The triple point of water, 273.16 K at a pressure of 611.2 Pa, is the basis of the definition of the kelvin
triple point in Medicine

triple point n.
The temperature and pressure at which three different phases, such as gaseous, liquid, and solid phases, of a particular substance can coexist in equilibrium.

triple point in Science
triple point  
The temperature and pressure at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F) and 4.58 mm (611.2Pa) of mercury and is used to calibrate thermometers. Compare critical point.
triple point in Culture

triple point definition


In physics, the temperature at which all three phases of matter (solid, liquid, and gas) for a given substance can coexist.

Note: The triple point for water is a little above the freezing point, and is used to define temperature scales.