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The scale of temperature equal to absolute temperature minus 273° (K − 273°). It is denoted as °C. Previously called centigrade. The standard temperature scale in the metric system, which sets the freezing point at 0° and the boiling point at 100° (compared to 32 and 212°, respectively, in the Fahrenheit scale). Named after Swedish astronomer Andres Celsius, who published his paper on the subject in 1742.