A metric unit of temperature, a derived unit of the International System of Units. Symbol: °C

Related to a metric temperature scale, originally defined as having the freezing point of water as 0 degrees and its boiling point as 100 degrees, at standard atmospheric pressure. The standardized definition has 0.01 °C as the triple point of water, and a difference in temperature of 1 °C corresponds to ¹⁄_(273.16) of the difference in temperature between the triple point and the absolute zero.

Of or relating to Anders Celsius (1701–1744), Swedish astronomer, physicist and mathematician.

A scale for measuring temperature, with the freezing point of water defined as zero degrees and the boiling point of water defined as 100 degrees.