\begin{definition}[Definition:Kelvin]
The '''kelvin''' is the SI base unit of absolute temperature.
Its two reference points are:
:$0 \ \mathrm K$, which is set at absolute zero, the temperature at which all thermal motion stops
:$273 \cdotp 16 \ \mathrm K$, which is set at the {{WP|Triple_point|triple point}} of water.
\end{definition}