kelvin

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A unit of absolute temperature equal to 1/273.16 of the absolute temperature of the triple point of water. One kelvin degree is equal to one Celsius degree.
• noun A temperature scale in which zero occurs at absolute zero and each degree equals one kelvin. Water freezes at 273.15 K and boils at 373.15 K.

from The Century Dictionary.

• noun A name proposed, in honor of Lord Kelvin, for the kilowatt-hour which is the British Board of Trade unit of work.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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 9/5 degrees Fahrenheit.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun In the International System of Units, the base unit of thermodynamic temperature; 1/273.16 of the thermodynamic temperature of the triple point of water. Shown as "K".
• noun A unit interval on the Kelvin scale.
• noun usually as postpositioned adjective A unit for a specific temperature on the Kelvin scale.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites
• noun British physicist who invented the Kelvin scale of temperature and pioneered undersea telegraphy (1824-1907)