| n. | 1. | The SI unit of temperature, defined as being 1/273.16 of the triple point of water; abbreviated K. The melting point of water at 760 mm pressure is 273.15 Kelvins, and the boiling point 373.15 Kelvins. One degree Kelvin is equal to one degree Centigrade, and |
| Noun | 1. | kelvin - the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites Synonyms: K |
| 2. | Kelvin - British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907) Synonyms: First Baron Kelvin, William Thompson |