Celsius
- 1Relating to a metric temperature scale on which water freezes at 0 degrees and boils at 100 degrees at standard atmospheric pressure.
Laboratory thermometers in most countries are calibrated in Celsius units.
At standard pressure, a Celsius reading of 100 marks the boiling point of water.
Similarcentigrade
Note
A scale named for the man who proposed it: the Swedish astronomer Anders Celsius, in 1742, hence the capital letter. Its modern definition no longer rests on freezing and boiling water but on the triple point of water, fixed at 0.01 °C, with each degree a set fraction of the span down to absolute zero. Centigrade is the older, now dated name. The word follows the number: 15.2 degrees Celsius.
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Origin
Named after the Swedish astronomer Anders Celsius (1701–1744), who first proposed the centigrade scale in 1742. His surname is a Latinized form of the estate's name, from Latin 'celsus' ('mound').