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  1. CATALYST Definition & Meaning - Merriam-Webster

    The meaning of CATALYST is a person or thing that provokes or speeds significant change or action. How to use catalyst in a sentence. Word History of Catalyst.

  2. CATALYST | English meaning - Cambridge Dictionary

    A catalyst is also a substance that causes or speeds a chemical reaction without itself being changed.

  3. Catalyst | Examples, Definition, & Facts | Britannica

    Catalyst, in chemistry, any substance that increases the rate of a reaction without itself being consumed. Enzymes are naturally occurring catalysts responsible for many essential …

  4. What Is a Catalyst? Understand Catalysis - Science Notes and …

    Sep 21, 2022 · In chemistry and biology, a catalyst is a substance the increases the rate of a chemical reaction without being consumed by it. Catalysis is the process of speeding up a …

  5. Catalysis - Wikipedia

    In general, chemical reactions occur faster in the presence of a catalyst because the catalyst provides an alternative reaction mechanism (reaction pathway) having a lower activation …

  6. CATALYST Definition & Meaning | Dictionary.com

    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 …

  7. Catalyst - Definition, Meaning & Synonyms | Vocabulary.com

    A catalyst is an event or person causing a change. Getting kicked out of your parents' house might be a catalyst for becoming more independent. The noun catalyst is something or …

  8. What Is a Catalyst and How Does It Work? - sciencenewstoday.org

    May 8, 2025 · A catalyst is a substance that speeds up a chemical reaction without itself undergoing any permanent chemical change. In other words, it’s not consumed in the …

  9. DOE Explains...Catalysts | Department of Energy

    A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is …

  10. CATALYST definition and meaning | Collins English Dictionary

    A catalyst is an agent or compound that is added to a process to make a chemical reaction happen more quickly. The catalyst can increase the reaction rate of the steam and can …