Definitions for absolute zero

This page provides all possible meanings and translations of the word absolute zero

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  1. absolute zero(noun)

    (cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal); 0 Kelvin or -273.15 centigrade or -459.67 Fahrenheit

WiktionaryRate this definition:(0.00 / 0 votes)

  1. absolute zero(Noun)

    The coldest possible temperature, zero on the Kelvin scale, or approximately 273.15 u00B0C, 459.67 u00B0F.

  2. absolute zero(Noun)

    A person or thing of absolutely no consequence.

  3. Origin: First attested in 1806.

FreebaseRate this definition:(0.00 / 0 votes)

  1. Absolute zero

    Absolute zero is the coldest possible temperature. More formally, it is the temperature at which entropy reaches its minimum value. The laws of thermodynamics state that absolute zero cannot be reached using only thermodynamic means. A system at absolute zero still possesses quantum mechanical zero-point energy, the energy of its ground state. The kinetic energy of the ground state cannot be removed. However, in the classical interpretation, it is zero and the thermal energy of matter vanishes. The zero point of any thermodynamic temperature scale, such as Kelvin or Rankine scale, is set at absolute zero. By international agreement, absolute zero is defined as 0K on the Kelvin scale and as −273.15° on the Celsius scale. This equates to −459.67° on the Fahrenheit scale and 0 R on the Rankine scale. Scientists have achieved temperatures extremely close to absolute zero, where matter exhibits quantum effects such as superconductivity and superfluidity.

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