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| 单词 | catalyst |
| 释义 | catalyst[ kat-l-ist ] / ˈkæt l ɪst / SEE SYNONYMS FOR catalyst ON THESAURUS.COM nounChemistry. a substance that causes or accelerates a chemical reaction without itself being affected. something that causes activity between two or more persons or forces without itself being affected. a person or thing that precipitates an event or change: His imprisonment by the government served as the catalyst that helped transform social unrest into revolution. a person whose talk, enthusiasm, or energy causes others to be more friendly, enthusiastic, or energetic. VIDEO FOR CATALYSTWATCH NOW: Can A Person Be A Catalyst?A catalyst means "something that causes activity, an event, or change." And usually, these events and changes are big. But, can a catalyst be a person? Origin of catalystFirst recorded in 1900–05; cataly(sis) + (-i)st OTHER WORDS FROM catalystself-cat·a·lyst, nounsem·i·cat·a·lyst, nounWords nearby catalystCatalonian, catalpa, catalufa, catalyse, catalysis, catalyst, catalytic, catalytic converter, catalytic cracker, catalytic cracking, catalyze Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for catalystBritish Dictionary definitions for catalystcatalyst / (ˈkætəlɪst) / nouna substance that increases the rate of a chemical reaction without itself suffering any permanent chemical changeCompare inhibitor (def. 2) a person or thing that causes a change Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for catalystcatalyst [ (kat-uh-list) ] In chemistry, a substance that causes a chemical reaction to occur but is not itself involved in the reaction. notes for catalystThe term catalyst is often used to refer to the prime agent of any change: “She was the catalyst for the reorganization.” The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for catalystcatalyst [ kăt′l-ĭst ] n.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. Other words from catalystcat′a•lyt′ic (kăt′l-ĭt′ĭk) adj.The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for catalystcatalyst [ 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. Other words from catalystcatalytic adjective (kăt′l-ĭt′ĭk)The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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