Online Dictionary

catalyst Explained

catalyst at CMU American English spelling Of Explained:

['kætələst]

catalyst at English => English (English Etymology) Of Explained:

1902, formed in Eng. (on analogy of analyst) from Gk. kata "down" + -lysis "a loosening" (comb. form). ///

catalyst at English => English (Longman) Of Explained:

n [C] [Date: 1900-2000; Origin: catalysis, on the model of analyst]//
1 technical a substance that makes a chemical reaction happen more quickly without being changed itself:
2 something or someone that causes an important change or event to happen: catalyst for// --They hope his election will act as a catalyst for reform.// -- catalytic/k[zB024]tl[hA366]t[hA366]k[hA36B]/ adj //

catalyst at English => English (The Britannica Concise) Of Explained:

Any substance of which a small proportion notably affects the reaction rate of a chemical reaction without itself being changed or consumed (see catalysis). One molecule may transform several million reactant molecules a minute. Gaseous, liquid, or solid, catalysts may be inorganic compounds, organic compounds, or complex combinations. They tend to be highly specific, reacting with only one substance or a small set of substances. Substances that alter them or block reactants' access to them may inhibit (poison) them. Catalysts are essential to virtually all industrial chemical reactions, especially in petroleum refining and synthetic organic chemical manufacturing. Most solid catalysts are fine-grained transition elements (metals) or their oxides. In a car's catalytic converter, the platinum catalyst converts unburned hydrocarbons and nitrogen compounds to products harmless to the environment. Water, especially salt water, catalyzes oxidation (see oxidation-reduction) and corrosion. Enzymes are among the most active and selective catalysts known.

catalyst at English => English (Moby Thesaurus II) Of Explained:

75 Moby Thesaurus words for "catalyst":
agent, agent provocateur, agitator, agitprop, alterant, alterative,
alterer, author, begetter, beginner, catalysis, catalytic agent,
causer, creator, decay, demagogue, dialysis, dissociation,
effector, engenderer, exciter, father, ferment, firebrand, fission,
fomenter, generator, goad, hydrolysis, hydrolyst, impetus, impulse,
incendiary, incentive, incitation, incitement, inciter, inflamer,
innovationist, innovator, inspirer, instigator, introducer, leaven,
maker, mischief-maker, modificator, modifier, mother, motivation,
mover, originator, parent, photolysis, precursor, prime mover,
primum mobile, producer, provocateur, provoker, rabble-rouser,
ringleader, rouser, seditionary, seditionist, sire, splitting,
spur, stimulant, thermolysis, transformer, transmogrifier,
troublemaker, urger, yeast

catalyst at English => English (Oxford Advanced Learners) Of Explained:

noun
1 (chemistry) a substance that makes a chemical reaction happen faster without being changed itself:
Chlorine will act as a catalyst.
2 ~ (for sth) a person or thing that causes a change:
I see my role as being a catalyst for change. * The riots were later seen as the catalyst for the new political developments.

catalyst at English => English (WordNet) Of Explained:

catalyst
n 1: (chemistry) a substance that initiates or accelerates a
chemical reaction without itself being affected [syn: {accelerator}]
[ant: {anticatalyst}]
2: something that causes an important event to happen; "the
invasion acted as a catalyst to unite the country"

catalyst at English (WD) Of Explained:

==English==
Inter: was wotd » 2010|October|30

Etymology

From Inter: suffix » catalysis|ist|lang=en.

Pronunciation

* Inter: a » UK Inter: IPA » /ˈkæt.əl.ɪst/
  • Inter: a » US Inter: IPA » /ˈkæt.ə.lɪst/


Inter: audio » En-us-ncalif-catalyst.ogg|Audio (US)

Noun

Inter: en-nou » n
  • Inter: chemistr » y A substance that increases the rate of a chemical reaction without being consumed in the process.
    1. 1988, Category: w - :Lubert Stryer|Lubert Stryer Biochemistry, 3rd edition, page 177
    2. : Enzymes, the catalysts of biological systems, are remarkable molecular devices that determine the pattern of chemical transformations.
    3. Someone or something that encourages progress or change.
    4. : Economic development and integration are working as a catalyst for peace.
    5. 1978, Ernest George Schwiebert, Trout, Volume 2
    6. : It was a morning baptized by my first cup of coffee, freshly brewed over a gravel-bar fire, while they celebrated with the stronger catalyst of sour-mash whiskey in their fishing-vest cups.
    7. 2004, Michael B. Oren, Six Days of War: June 1967 and the making of the modern Middle East, page 76
    8. : Israel's fear for the reactor—rather than Egypt's of it—was the greater catalyst for war.
    9. 2006, The Freedom Writers, with Erin Gruwell, The Freedom Writers Diary: How a Teacher and 150 Teens Used Writing to Change Themselves and the World Around Them, Diary 74
    10. : Rosa Parks was a true catalyst for change and she was only one person. Hearing about Rosa Parks and her protest showed me that there is hope for me and all the students in Ms. G's classes to truly be catalysts for change.
    11. Inter: automotiv » e A catalytic converter.

      Synonyms

      * Inter: sense » Someone or something that encourages progress or change stimulus, straw that stirs the drink

      Antonyms

      * Inter: sense » something that encourages change inhibitor

  • Inter: sense » something that enhances or accelerates dampener

    Derived terms

    * catalyse, catalyze
  • catalysis
  • catalytic

    Translations

    Inter: trans-top » substance which increases the rate of a chemical reaction without being consumed in the process
  • Armenian: Inter: t- » hy|կատալիզատոր|tr=katalizator|sc=Armn
  • Azeri: Inter: t- » az|katalizator
  • Belarusian: Inter: t- » be|каталізатар|tr=katalizatar|sc=Cyrl
  • Chinese:
  • : Mandarin: Inter: t » cmn|觸媒|sc=Hani, Inter: t » cmn|触媒|tr=chùméi|sc=Hani, Inter: t » cmn|催化劑|sc=Hani, Inter: t » cmn|催化剂|tr=cuīhuàjì|sc=Hani
  • Czech: Inter: t- » cs|katalyzátor|m
  • Dutch: Inter: t+ » nl|katalysator
  • Esperanto: Inter: t- » eo|katalizilo
  • Estonian: Inter: t- » et|katalüsaator
  • Finnish: Inter: t- » fi|katalyytti
  • French: Inter: t+ » fr|catalyseur|m
  • Georgian: Inter: t- » ka|კატალიზატორი|tr=katalizatori|sc=Geor
  • German: Inter: t+ » de|Katalysator|m
  • Greek: Inter: t+ » el|καταλύτης|m|tr=katalýtis|sc=Grek
  • Hungarian: Inter: t+ » hu|katalizátor
  • Icelandic: Inter: t- » is|efnahvati|m, Inter: t+ » is|hvati|m
  • Italian: Inter: t+ » it|catalizzatore|m

  • Inter: trans-mi » d
    • Japanese: Inter: t+ » ja|触媒|tr=しょくばい, shokubai|sc=Jpan
    • Kazakh: Inter: t » kk|катализатор|sc=Cyrl
    • Kyrgyz: Inter: t- » ky|катализатор|sc=Cyrl
    • Latvian: Inter: t- » lv|katalizators
    • Polish: Inter: t+ » pl|katalizator|m
    • Portuguese: Inter: t+ » pt|catalisador|m
    • Romanian: Inter: t- » ro|catalizator|m
    • Russian: Inter: t+ » ru|катализатор|m|tr=katalizátor|sc=Cyrl
    • Serbo-Croatian:
    • : Cyrillic: Inter: t- » sh|катализатор|m|alt=каталѝза̄тор|sc=Cyrl
    • : Roman: Inter: t- » sh|katalizator|m|alt=katalìzātor
    • Spanish: Inter: t- » es|catalizador|m
    • Tajik: Inter: t- » tg|катализатор|sc=Cyrl
    • Tatar: Inter: t- » tt|катализатор|sc=Cyrl
    • Telugu: Inter: t+ » te|ఉత్ప్రేరకం|tr=utprearakam
    • Turkish: Inter: t+ » tr|katalizör, Inter: t+ » tr|tezgen, Inter: t- » tr|ivdirgen
    • Ukrainian: Inter: t+ » uk|каталізатор|m|tr=katalizátor|sc=Cyrl


    Inter: trans-botto » m
    Inter: trans-top » someone or something that helps or encourages progress or change
    • Czech: Inter: t- » cs|katalyzátor|m
    • Finnish: Inter: t+ » fi|katalysaattori, Inter: t- » fi|katalyytti
    • French: Inter: t+ » fr|catalyseur, Inter: t+ » fr|ferment, Inter: t+ » fr|démiurge, Inter: t+ » fr|électron libre, Inter: t+ » fr|levain, Inter: t+ » fr|agitateur, Inter: t+ » fr|enzyme
    • Greek: Inter: t+ » el|καταλύτης|m|tr=katalýtis|sc=Grek
    • Hungarian: Inter: t+ » hu|katalizátor


    Inter: trans-mi » d
  • Italian: Inter: t+ » it|catalizzatore|m
  • Polish: Inter: t+ » pl|katalizator|m
  • Portuguese: Inter: t+ » pt|catalisador
  • Romanian: Inter: t- » ro|catalizator|m
  • Russian: Inter: t+ » ru|катализатор|m|sc=Cyrl|tr=katalizátor
  • Spanish: Inter: t- » es|catalizador, Inter: t- » es|fermento, Inter: t+ » es|levadura, Inter: t- » es|agitador, Inter: t- » es|demiurgo, Inter: t+ » es|enzima

  • Inter: trans-botto » m
    Inter: trans-see » catalytic converter

    See also

    * enzyme
    Translation: af » catalyst
    Translation: ar » catalyst
    Translation: et » catalyst
    Translation: el » catalyst
    Translation: fa » catalyst
    Translation: fr » catalyst
    Translation: ko » catalyst
    Translation: io » catalyst
    Translation: it » catalyst
    Translation: kn » catalyst
    Translation: hu » catalyst
    Translation: mg » catalyst
    Translation: mr » catalyst
    Translation: my » catalyst
    Translation: nl » catalyst
    Translation: ja » catalyst
    Translation: pl » catalyst
    Translation: ru » catalyst
    Category: simple:catalyst -
    Translation: fi » catalyst
    Translation: sv » catalyst
    Translation: ta » catalyst
    Translation: tr » catalyst
    Translation: uk » catalyst
    Translation: vi » catalyst
    Translation: zh » catalyst