n. (also kathode) Electr.
1 the negative electrode in an electrolytic cell or electronic valve or tube.
2 the positive terminal of a primary cell such as a battery (opp. ANODE).
Phrases and idioms:
cathode ray a beam of electrons emitted from the cathode of a high-vacuum tube. cathode-ray tube a high-vacuum tube in which cathode rays produce a luminous image on a fluorescent screen.
Abbr.: CRT.
cathodal adj. cathodic adj.
Etymology: Gk kathodos descent f. kata down + hodos way

Useful english dictionary. 2012.

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  • cathode — [ katɔd ] n. f. • 1838; formé en angl. par Faraday d apr. le gr. kata « en bas » et hodos « chemin » ♦ Sc. Électrode négative (opposé à anode, anticathode).⇒ électrolyse. Pôle d une pile d une batterie chargé positivement. ● cathode nom féminin ( …   Encyclopédie Universelle

  • Cathode — Cath ode, n. [Gr. ? descent; ? down + ? way.] (Physics) The part of a voltaic battery by which the electric current leaves substances through which it passes, or the surface at which the electric current passes out of the electrolyte; the… …   The Collaborative International Dictionary of English

  • cathode — 1834, from Gk. kathodos a way down, from kata down + hodos way (see CEDE (Cf. cede)). So called from the path the electric current was supposed to take. Related: Cathodic. Cathode ray first attested 1880, but the phenomenon known from 1859;… …   Etymology dictionary

  • Cathode — Cathode. См. Катод. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • cathode — ► NOUN ▪ a negatively charged electrode. The opposite of ANODE(Cf. ↑anode). ORIGIN Greek kathodos way down …   English terms dictionary

  • cathode — [kath′ōd΄] n. [coined by FARADAY Michael < Gr kathodos, descent < kata , down + ODE1] 1. in an electroplating cell, the negatively charged electrode, from which current flows 2. in an electron tube, the negatively charged electron emitter 3 …   English World dictionary

  • Cathode — Diagram of a copper cathode in a galvanic cell (e.g., a battery). A positive current i flows out of the cathode (CCD mnemonic: Cathode Current Departs). A cathode is an electrode through which electric current flows out of a polarized electrical… …   Wikipedia

  • Cathode — Sur les autres projets Wikimedia : « Cathode », sur le Wiktionnaire (dictionnaire universel) La cathode[1] d un appareil passif parcouru par un courant continu est l électrode d où, en courant conventionnel, sort le courant (en… …   Wikipédia en Français

  • cathode — /kath ohd/, n. 1. the electrode or terminal by which current leaves an electrolytic cell, voltaic cell, battery, etc. 2. the positive terminal of a voltaic cell or battery. 3. the negative terminal, electrode, or element of an electron tube or… …   Universalium

  • cathode —   n. negative terminal; electrode by which current leaves.    ♦ cathode particle, electron.    ♦ cathode ray, stream of electrons from cathode to anode in discharge tube;    ♦ cathode ray tube, vacuum tube in television receiver on fluorescent… …   Dictionary of difficult words

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