Full name: kelvin
Plural form: kelvins
Symbol: K
Alternate spelling: degree kelvin
Category type: temperature
Scale factor: 1
The SI base unit for temperature is the kelvin.
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The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvins is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. The Celsius temperature scale is now defined in terms of the kelvin, with 0 °C corresponding to 273.15 kelvins, approximately the melting point of water under ordinary conditions.
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