Meaning & use
Kelvin
Last updated
The base unit of thermodynamic temperature in the International System of Units, equal in size to one degree Celsius but starting at absolute zero.
See it in a sentence
Water freezes at 273.15 kelvin.
Scientists measure extremely cold experiments in kelvin rather than Celsius.
A note on using this word
The unit is named after the 19th-century physicist Lord Kelvin (William Thomson), and unlike most other units, it's written without a degree symbol.
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