Catalysis
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:

  • catalysis — (n.) 1650s, dissolution, from Gk. katalysis dissolution, a dissolving (of governments, military units, etc.), from katalyein to dissolve, from kata down (or completely ), see CATA (Cf. cata ), + lyein to loosen (see LOSE (Cf. lose)) …   Etymology dictionary

  • catalysis — ► NOUN ▪ the acceleration of a chemical reaction by a catalyst. DERIVATIVES catalytic adjective. ORIGIN Greek katalusis dissolution …   English terms dictionary

  • catalysis — [kə tal′ə sis] n. pl. catalyses [kə tal′əsēz΄] [ModL < Gr katalysis, dissolution: see CATA & LYSIS] the speeding up or, sometimes, slowing down of the rate of a chemical reaction caused by the addition of some substance that does not undergo a …   English World dictionary

  • Catalysis — Catalyst redirects here. For other uses, see Catalyst (disambiguation). Solid heterogeneous catalysts such as in automobile catalytic converters are plated on structures designed to maximize their surface area …   Wikipedia

  • catalysis — catalytic /kat l it ik/, adj., n. catalytical, adj. catalytically, adv. /keuh tal euh sis/, n., pl. catalyses / seez /. 1. Chem. the causing or accelerating of a chemical change by the addition of a catalyst. 2. an action between two or more… …   Universalium

  • catalysis — The effect that a catalyst exerts upon a chemical reaction. [G. katalysis, dissolution] contact c. a process wherein the catalyst is a solid and the catalyzed reaction is produced after the reactants (usually gases) have made contact with the… …   Medical dictionary

  • catalysis — [[t]kətæ̱lɪsɪs[/t]] N UNCOUNT Catalysis is the speeding up of a chemical reaction by adding a catalyst to it. [TECHNICAL] …   English dictionary

  • catalysis — 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

  • catalysis — katalizė statusas T sritis chemija apibrėžtis Reakcijos greitinimas katalizatoriumi. atitikmenys: angl. catalysis rus. катализ …   Chemijos terminų aiškinamasis žodynas

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

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