Definition:Kelvin

Definition
The kelvin is the SI base unit of temperature.

Its two reference points are:
 * $$0 \ \mathrm K$$, which is set at absolute zero, the temperature at which all thermal motion stops;
 * $$273.16 \ \mathrm K$$, which is set at the triple point of water.

Symbol
The symbol for the kelvin is $$\mathrm {K}$$.

Note that, unlike the symbols for other temperature scales, there is no degree symbol used here: $${}^\circ \mathrm K$$ is technically incorrect.