Definition:Celsius

Definition
Celsius is a temperature scale.

Its two reference points are:
 * $0 \cels$, which is set at the melting point of water.
 * $100 \cels$, which is set at the boiling point of water, as defined at sea level and standard atmospheric pressure.

A temperature measured in Celsius is often referred to as so many degrees Celsius.

Also known as
The Celsius scale is also known as the centigrade scale, but this usage has been obsolete since $1948$.