catalysis, contact action
(noun) acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction; “of the top 50 commodity chemicals, 30 are created directly by catalysis and another 6 are made from raw materials that are catalytically produced”
Source: WordNet® 3.1
catalysis (countable and uncountable, plural catalyses)
(chemistry) The increase of the rate of a chemical reaction, induced by a catalyst.
Source: Wiktionary
Ca*tal"y*sis, n.; pl. Catalyse. Etym: [ML., fr. Gr.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition
17 March 2025
(noun) magnet made of a substance whose magnetization is proportional to the strength of the magnetic field applied to it
Coffee is a brewed drink prepared from roasted coffee beans, the seeds of berries from certain Coffea species. When coffee berries turn from green to bright red – indicating ripeness – they are picked, processed, and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor.
