a commercial unit of heat energy. The therm is equal to 100 000 Btu. Because there have been several definitions of the Btu, there are two official definitions of the therm. In the U.S., the legal definition (made in 1968) is that the therm equals 105.4804 megajoules. The European Union's definition, made in 1979 using the more current IT Btu, is 105.5060 megajoules. Either way the therm is equal to about 25 200 (large) calories or about 29.3 kilowatt hours of electrical energy. One therm can also be provided by about 96.7 cubic feet of natural gas. The therm has sometimes been confused with the thermie (see below). The names of both units come from the Greek word for heat, therme.

Dictionary of units of measurement. 2015.

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  • Therm — ist ein Wortbestandteil (Wortkonstituente), der aus dem Griechischen stammt (θερμός „thermós“ „warm, heiß, hitzig“) und in vielen deutschen Fremdwörtern mit entsprechender Bedeutung vorkommt: Thermik, Thermometer und viele andere.… …   Deutsch Wikipedia

  • therm — therm·antidote; therm·el; therm; therm·ion; therm·ion·ic; therm·ion·ics; therm·is·tor; xe·ro·therm; therm·ion·i·cal·ly; …   English syllables

  • therm- — Therm , vor Konsonanten auch thermal , Thermal , thermo , Thermo [griech. thermós = warm, heiß]: Bestimmungswort von Zus. mit den Bed. »warm, Temperatur…«, z. B. thermisch, Thermometer, Thermalisierung, Thermalbad. * * * therm , Therm : ↑ thermo …   Universal-Lexikon

  • therm- — therm(o) ♦ Élément, du gr. thermos « chaud », ou thermon « chaleur ». ⇒ therme. therm(o) , therme, thermie, thermique éléments, du gr. thermos, chaud , ou thermainein, chauffer …   Encyclopédie Universelle

  • therm — [θɜːm ǁ θɜːrm] noun [countable] a measurement of heat equal to 100,000 British Thermal Units, used in Britain for measuring how much gas someone has used * * * therm UK US /θɜːm/ noun [C] MEASURES, NATURAL RESOURCES ► a unit of heat used for… …   Financial and business terms

  • Therm — (th[ e]rm), n. one of several units of heat, especially one equivalent to 1000 large calories, or 100,000 British thermal units. [PJC] …   The Collaborative International Dictionary of English

  • therm... — therm...,   ...therm, Wortbildungselement, thermo …   Universal-Lexikon

  • therm — [θə:m US θə:rm] n [Date: 1900 2000; : Greek; Origin: therme heat ] a unit for measuring heat, especially when calculating amounts of gas used ▪ UK gas was selling for as little as 6p a therm …   Dictionary of contemporary English

  • therm... — therm..., Therm... vgl. ↑thermo..., Thermo …   Das große Fremdwörterbuch

  • therm|i|on|ic — «THURM y ON ihk, THUR mee », adjective. Physics. of or having to do with thermions: »thermionic emission. A thermionic generator is a vacuum or gas filled device with two elements or electrodes insulated from one another (J. J. William Brown).… …   Useful english dictionary

  • therm|i|on — «THURM Y uhn, THUR mee », noun. Physics. an electrically charged particle, either positive (an ion) or negative (an electron), given off by a heated body. ╂[< therm + ion] …   Useful english dictionary

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