Celsius temperature scale


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Related to Celsius temperature scale: degree Celsius, Celsius

Celsius temperature scale

(sĕl`sēəs), temperaturetemperature,
measure of the relative warmth or coolness of an object. Temperature is measured by means of a thermometer or other instrument having a scale calibrated in units called degrees. The size of a degree depends on the particular temperature scale being used.
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 scale according to which the temperature difference between the reference temperatures of the freezing and boiling points of water is divided into 100 degrees. The freezing point is taken as 0 degrees Celsius and the boiling point as 100 degrees Celsius. The Celsius scale is widely known as the centigrade scale because it is divided into 100 degrees. It is named for the Swedish astronomer Anders CelsiusCelsius, Anders
, 1701–44, Swedish astronomer. While professor of astronomy at the Univ. of Uppsala (1730–44), he traveled through Germany, France, and Italy, visiting great observatories.
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, who established the scale in 1742. William Thomson Kelvin used it as the basis of his absolute temperature scale, now known as the Kelvin temperature scaleKelvin temperature scale,
a temperature scale having an absolute zero below which temperatures do not exist. Absolute zero, or 0°K;, is the temperature at which molecular energy is a minimum, and it corresponds to a temperature of −273.
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, in 1848 (see also absolute zeroabsolute zero,
the zero point of the ideal gas temperature scale, denoted by 0 degrees on the Kelvin and Rankine temperature scales, which is equivalent to −273.15°C; and −459.67°F;.
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). Temperatures on the Celsius scale can be converted to equivalent temperatures on the Fahrenheit temperature scaleFahrenheit temperature scale
, temperature scale in which the temperature difference between two reference temperatures, the melting and boiling points of water, is divided into 180 equal intervals called degrees.
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 by multiplying the Celsius temperature by 9/5 and adding 32° to the result, according to the formula 9C/5+32=F.

Celsius temperature scale

[′sel·se·əs ′tem·prə·chər ‚skāl]
(thermodynamics)
Temperature scale in which the temperature Θ c in degrees Celsius (°C) is related to the temperature Tk in kelvins by the formula Θ c = Tk- 273.15; the freezing point of water at standard atmospheric pressure is very nearly 0°C and the corresponding boiling point is very nearly 100°C. Formerly known as centigrade temperature scale.