Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary

Search Dictionary:  

Meaning of CATALYSIS

Pronunciation:  ku'talisis

WordNet Dictionary
[n]  acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction

CATALYSIS is a 9 letter word that starts with C.


 See Also: autocatalysis, chemical action, chemical change, chemical process



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

         Sad catalysis and declension of piety. --Evelyn.

2. (Chem.)
   (a) A process by which reaction occurs 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 soluble ferments (as
       diastase, or ptyalin) on starch.
   (b) The catalytic force.

Biology Dictionary
 Definition: The acceleration of a chemical reaction by a catalyst.
Thesaurus Terms
 Related Terms: acetification, acidification, acidulation, alkalization, avatar, carbonation, catabolism, catalyst, chemicalization, consubstantiation, decay, dialysis, displacement, dissociation, electrolysis, ferment, fermentation, fission, heterotopia, hydrogenation, hydrolysis, hydrolyst, isomerism, metabolism, metagenesis, metamerism, metamerization, metamorphism, metamorphosis, metastasis, metathesis, metempsychosis, mutant, mutated form, mutation, nitration, oxidation, oxidization, permutation, phosphatization, photolysis, polymerism, polymerization, position isomerism, reduction, reincarnation, saturization, splitting, sport, thermolysis, transanimation, transfiguration, transfigurement, transformation, transformism, translation, translocation, transmigration, transmogrification, transmutation, transposition, transubstantiation, working