Kelvin


Kelvin
/kel"vin/, n.
1. William Thomson, 1st Baron, 1824-1907, English physicist and mathematician.
2. (l.c.) the base SI unit of temperature, defined to be 1/273.16 of the triple point of water. Abbr.: K
adj.
3. Thermodynam. noting or pertaining to an absolute scale of temperature (Kelvin scale) in which the degree intervals are equal to those of the Celsius scale and in which the triple point of water has the value 273.16 Kelvin. Cf. absolute temperature scale, Celsius (def. 2).
4. Also, Kelwin /kel"win/. a male given name.

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▪ unit of measurement
      base unit of thermodynamic temperature measurement in the International System of Units (SI). It is defined as 100/27,316 of the triple point (equilibrium among the solid, liquid, and gaseous phases) of pure water. The kelvin is also the fundamental unit of the Kelvin scale, an absolute temperature scale named for the British physicist William Thomson (known as Lord Kelvin (Kelvin, William Thomson, Baron)). An absolute temperature scale has as its zero point absolute zero (−273.15° on the Celsius temperature scale and −459.67° on the Fahrenheit temperature scale), the theoretical temperature at which the molecules of a substance have the lowest energy—hence, all values on such a scale are nonnegative. Many physical laws and formulas can be expressed more simply when an absolute temperature scale is used; accordingly, the Kelvin scale has been adopted as the international standard for scientific temperature measurement. The difference between the freezing and boiling points of water is 100 degrees in both the Kelvin and the Celsius scale; thus, the Kelvin degree has the same magnitude as the Celsius degree.

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Universalium. 2010.

Look at other dictionaries:

  • kelvin — [ kɛlvin ] n. m. • 1953; de lord Kelvin, physicien angl. ♦ Métrol. Unité de mesure thermodynamique de température (symb. K). Le kelvin est défini comme la fraction de 1/273,16 de la température du point triple de l eau. La température de zéro… …   Encyclopédie Universelle

  • kelvin — KÉLVIN s.m. (fiz.) Unitate fundamentală pentru măsurarea temperaturii în sistemul internaţional. [abr.: K] – Din engl., fr. kelvin. Trimis de catalin caba, 29.09.2006. Sursa: DEX 98  KÉLVIN s.m. Unitate de măsură a temperaturii, egală cu… …   Dicționar Român

  • Kelvin — Kel vin (k[e^]l v[i^]n), n. [from Lord Kelvin, English physicist.] 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 …   The Collaborative International Dictionary of English

  • kelvin — kèlvīn m <G kelvína> DEFINICIJA fiz. SI jedinica termodinamičke temperature (simbol K), definirana kao 1/273.16 termodinamičke temperature trojne točke vode; jedan Kelvin jednak je jednom Celzijevom stupnju, ali za razliku od Celzijeve… …   Hrvatski jezični portal

  • kelvin — (Del primer barón de Kelvin, W. ☛ V. Thomson, 1824 1907, matemático y físico inglés). m. Fís. Unidad de temperatura del Sistema Internacional. Es igual al grado centígrado, pero en la escala de temperatura absoluta el 0 está fijado en 273,16°C.… …   Diccionario de la lengua española

  • Kelvin — m English: modern given name, first used in the 1920s. It is taken from a Scottish river which runs through Glasgow into the Clyde (cf. CLYDE (SEE Clyde)). Its choice as a given name may also have been influenced by the form of such names as… …   First names dictionary

  • kèlvīn — m 〈G kelvína〉 fiz. SI jedinica termodinamičke temperature (simbol K), definirana kao 1/273.16 termodinamičke temperature trojne točke vode; jedan Kelvin jednak je jednom Celzijevom stupnju, ali za razliku od Celzijeve skale Kelvinova skala… …   Veliki rječnik hrvatskoga jezika

  • Kelvin — unit of absolute temperature scale, 1911, in honor of British physicist Sir William Thompson, Lord Kelvin (1824 1907) …   Etymology dictionary

  • kelvin — sustantivo masculino 1. Área: física Unidad de temperatura en el Sistema Internacional. grado* Kelvin …   Diccionario Salamanca de la Lengua Española

  • kelvin — ► NOUN ▪ the SI base unit of thermodynamic temperature, equal in magnitude to the degree Celsius. ORIGIN named after the British physicist William T. Kelvin (1824 1907) …   English terms dictionary

  • Kelvin — Kelvin1 [kel′vin] adj. [after KELVIN2 1st Baron] designating or of a scale of thermodynamic temperature measured from absolute zero ( 273.16°C): the formula for converting Celsius to Kelvin is °K=°C + 273.16 n. [k ] a basic unit of temperature on …   English World dictionary


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