triple point

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triple point

n.
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 degrees Celsius and 4.58 millimeters of mercury and is used to calibrate thermometers.

triple point

n
(Chemistry) 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

tri′ple point′



n.
the particular temperature and pressure at which the solid, liquid, and gaseous phases of a given substance are all at equilibrium with one another.
[1870–75]

triple point

The intersection of the incident, reflected, and fused (or Mach) shock fronts accompanying an air burst. The height of the triple point above the surface, i.e., the height of the Mach stem, increases with increasing distance from a given explosion.

triple point

The conditions of temperature and pressure at which the three phases of a substance (solid, liquid, and gas) are in equilibrium.
References in periodicals archive ?
Members who register will earn triple points at participating hotels worldwide.
Between February 1 and April 30, Choice Hotels Canada is offering Choice Club Plus, Aeroplan and associated airline members triple points or miles for stays at Canadian Choice hotels booked on the Choice Web site and double points or miles for stays booked in person or by phone.