Catalyse
Catalysis Ca*tal"y*sis, n.; pl. {Catalyse}.[ML., fr. Gr. ? dissolution, fr. ? to destroy, dissolve; kata` down, wholly + ? to loose.] [1913 Webster] 1. Dissolution; degeneration; decay. [R.] [1913 Webster]

Sad catalysis and declension of piety. --Evelyn. [1913 Webster]

2. (Chem.) (a) A process by which a chemical reaction is accelerated in the presence of certain agents which were formerly believed to exert an influence by mere contact. It is now believed that such reactions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is apparenty left unchanged; as, the catalysis of making ether from alcohol by means of sulphuric acid; or catalysis in the action of enzymes (as diastase, or ptyalin) on starch. (b) The catalytic force. [1913 Webster +PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • catalyse — [ kataliz ] n. f. • 1836; angl. catalysis; gr. katalusis « dissolution » ♦ Chim. Modification (surtout accélération) d une réaction chimique sous l effet d une substance (⇒ catalyseur) qui ne subit pas de modification elle même. Catalyse de l… …   Encyclopédie Universelle

  • Catalyse — Cat a*lyse (k[a^]t [.a]*l[imac]z), v. t. [ML., fr. Gr. ? dissolution, fr. ? to destroy, dissolve; kata down, wholly + ? to loose.] same as {catalyze}. [PJC] …   The Collaborative International Dictionary of English

  • catalyse — (v.) variant spelling of CATALYZE (Cf. catalyze) (q.v.); for spelling, see IZE (Cf. ize) …   Etymology dictionary

  • catalyse — (US catalyze) ► VERB ▪ cause or accelerate (a reaction) by acting as a catalyst. DERIVATIVES catalyser noun …   English terms dictionary

  • Catalyse — La catalyse est l action d une substance appelée catalyseur sur une transformation chimique dans le but d augmenter sa vitesse de réaction. Le catalyseur, qui est en général en quantité beaucoup plus faible que les réactifs, n est pas consommé et …   Wikipédia en Français

  • catalyse — catalyze catalyze v. t. 1. 1 (chemistry) to cause (a chemical reaction) to proceed more quickly by contacting the reactant(s) with another substance; as, moisture catalyzes the oxidation of iron in air. [Also spelled {catalyse}.] Syn: change by… …   The Collaborative International Dictionary of English

  • catalyse — verb Catalyse/catalyze is used with these nouns as the object: ↑reaction …   Collocations dictionary

  • catalyse — [[t]kæ̱təlaɪz[/t]] catalyses, catalysing, catalysed (in AM, use catalyze) 1) VERB If something catalyses a thing or a situation, it makes it active. [FORMAL] [V n] Any unexpected circumstance that arises may catalyze a sudden escalation of… …   English dictionary

  • catalyse — katalizė statusas T sritis Standartizacija ir metrologija apibrėžtis Reakcijos greitinimas katalizatoriumi. atitikmenys: angl. catalysis vok. Katalyse, m rus. катализ, m pranc. catalyse, f …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • catalyse — katalizė statusas T sritis fizika atitikmenys: angl. catalysis vok. Katalyse, f rus. катализ, m pranc. catalyse, f …   Fizikos terminų žodynas

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