catalyst

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cat·a·lyst

 (kăt′l-ĭst)
n.
1. Chemistry A substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.
2. One that precipitates a process or event, especially without being involved in or changed by the consequences: "A free press ... has remained ... a vital catalyst to an informed and responsible electorate" (Robert O'Neal).

[From catalysis.]

catalyst

(ˈkætəlɪst)
n
1. (Chemistry) a substance that increases the rate of a chemical reaction without itself suffering any permanent chemical change. Compare inhibitor2
2. a person or thing that causes a change

cat•a•lyst

(ˈkæt l ɪst)

n.
1. a substance that causes or speeds a chemical reaction without itself being affected.
2. a person or thing that precipitates an event or change.
[1900–05; cataly (sis) + (-i) st]

cat·a·lyst

(kăt′l-ĭst)
A substance that starts or speeds up a chemical reaction while undergoing no permanent change itself. The enzymes in saliva, for example, are catalysts in digestion.

catalyze verb

catalyst

A substance which alters the rate of a chemical reaction. It takes part in the reaction but remains chemically unchanged by it.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.catalyst - (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affectedcatalyst - (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
activator - (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
biocatalyst - a biochemical catalyst such as an enzyme
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
platinum black - a fine black powder of platinum; used as a catalyst in chemical reactions
anticatalyst - (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst
2.catalyst - something that causes an important event to happen; "the invasion acted as a catalyst to unite the country"
causal agency, causal agent, cause - any entity that produces an effect or is responsible for events or results

catalyst

noun
An agent that stimulates or precipitates a reaction, development, or change:
Translations
حَفّاز، مُحَفِّزمادَّةٌ حَفّازَه
katalyzátor
drivkraftigangsætterkatalysator
katalysaattorikatalyytti
hvatamaîur, hvatihvati
kas pagreitina permainaskatalizatoriuskatalizuojantis
katalizators
katalyzátor
katalizörnedensebep

catalyst

[ˈkætəlɪst] N (Chem, fig) → catalizador m

catalyst

[ˈkætəlɪst] n
(= person, event) → catalyseur m
to act as a catalyst → servir de catalyseur
(CHEMISTRY)catalyseur m

catalyst

n (lit, fig)Katalysator m

catalyst

[ˈkætəlɪst] n (all senses) → catalizzatore m

catalyst

(kӕtəlist) noun
1. a substance which causes or assists a chemical change in another substance without itself undergoing any permanent chemical change.
2. someone or something that helps bring about a change.
ˌcataˈlytic adjective

cat·a·lyst

a. catalítico-a, agente estimulante de una reacción química sin afectarla.
References in periodicals archive ?
Dabco 33-LV and BL-11 tertiary amine catalysts for flexible slabstock and flexible molded systems provide precise control of gelling and blowing.
The most widely used catalysts are bases, such as sodium hydroxide, that convert 98 percent of the starting materials into the esters.
market for polymerization catalysts is forecast to grow 5.
NOx adsorbers, also known as NOx storage catalysts, provide stable storage for the nitrogen oxides during lean running that is typical in diesel engines, in order to release them in the form of the air component nitrogen during short-term operation using additional fuel.
This report analyzes the worldwide markets for Chemical Processing Catalysts in Millions of US$.
Dabco NEM, NMM and NCM, morpholine-based catalysts, and Dabco B-16 catalyst for polyester slabstock foam.
But separating catalysts from final products typically requires expensive and sometimes-toxic solvents that companies later have to dispose of.
The catalysts and catalyst supports are used by Montell and its licensees for the production of Spheripol process polypropylene, Spherilene process polyethylene and for its own production of Catalloy process products.
This report analyzes the worldwide markets for Petroleum Refining Catalysts in US$ Million.
Dabco T-9, %12 and 120 tin-based catalysts useful in various foam systems.
This reaction is sustained by catalysts -- chemical species which cause the building block molecules to be changed from their stable state into a more reactive state, to join these energized molecules together, and to continue this reaction using a supply of fresh monomers to form molecular chains.
Their new catalyst, which they can tailor to speed up a wide range of reactions, has three critical features that distinguish it from similar catalysts, says Wan.