Absolute zero
WordNet
noun
(1) (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
WiktionaryText
Noun
- The coldest possible temperature, zero on the Kelvin scale, or approximately −273.15 °C, −459.67 °F.
- A person or thing of absolutely no consequence.