\katˈaləsˌɪs], \katˈaləsˌɪs], \k_a_t_ˈa_l_ə_s_ˌɪ_s]\
Definitions of CATALYSIS
- 2011 - English Dictionary Database
- 2010 - New Age Dictionary Database
- 1913 - Webster's Revised Unabridged Dictionary
- 1920 - A practical medical dictionary.
- 1898 - Warner's pocket medical dictionary of today.
- 1914 - Nuttall's Standard dictionary of the English language
- 1874 - Etymological and pronouncing dictionary of the English language
- 1920 - A dictionary of scientific terms.
- 1846 - Medical lexicon: a dictionary of medical science
- 1916 - Appleton's medical dictionary
- 1871 - The Cabinet Dictionary of the English Language
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By DataStellar Co., Ltd
By Stedman, Thomas Lathrop
By William R. Warner
By Nuttall, P.Austin.
By Stormonth, James, Phelp, P. H.
By Henderson, I. F.; Henderson, W. D.
By Robley Dunglison
Catalytic action, contact action; a chemical action in which one body produces changes in one or more other bodies, without itself undergoing any change. Some examples of so called c, however, which have been most thoroughly investigated, have proved to be instances of double decomposition, the body to which the catalytic action had been ascribed really undergoing decomposition and immediately reforming, in order to be again decomposed. By a constant repetition of this process, a minute portion of the body so acting may cause chemical changes in a large bulk of other substances. The prevailing idea is that the substances which cause the c. has only the property of accelerating a reaction which would take place under any circumstances, but in a much longer time. [Gr.]
By Smith Ely Jelliffe
Word of the day
Mrs Caroline Lee Hentz (Whiting)
- An American writer of popular romances; born at Lancaster, Mass., 1800; died Marianna, Fla., Feb. 11, 1856. Among her works may be named: "Aunt Patty's Scrap-Bag"(1846); "The Mob Cap"(1848); Planter's Northern Bride"(1854); etc.