[kuh-tal-uh-sis] /kəˈtæl ə sɪs/
noun, plural catalyses
[kuh-tal-uh-seez] /kəˈtæl əˌsiz/ (Show IPA)
Chemistry. the causing or accelerating of a chemical change by the addition of a .
an action between two or more persons or forces, initiated by an agent that itself remains unaffected by the action:
social catalyses occasioned by controversial writings.
noun (pl) -ses (-ˌsiːz)
acceleration of a chemical reaction by the action of a catalyst
1650s, “dissolution,” from Latinized form of Greek katalysis “dissolution, a dissolving” (of governments, military units, etc.), from katalyein “to dissolve,” from kata- “down” (or “completely”), see cata-, + lyein “to loosen” (see lose). Chemical sense “change caused by an agent which itself remains unchanged” is attested from 1836, introduced by Swedish chemist Jöns Jakob Berzelius (1779-1848).
catalysis ca·tal·y·sis (kə-tāl’ĭ-sĭs)
n. pl. ca·tal·y·ses (-sēz’)
The action of a catalyst, especially an increase in the rate of a chemical reaction.
[kat-uh-strof-ik] /ˌkæt əˈstrɒf ɪk/ adjective 1. of the nature of a , or disastrous event; calamitous: a catastrophic failure of the dam. adj. 1824, from catastrophe + -ic. Related: Catastrophical; catastrophically.
[kat-i-gawr-i-kuh l, -gor-] /ˌkæt ɪˈgɔr ɪ kəl, -ˈgɒr-/ adjective 1. without exceptions or conditions; absolute; unqualified and unconditional: a categorical denial. 2. Logic. 3. of, relating to, or in a category. /ˌkætɪˈɡɒrɪkəl/ adjective 1. unqualified; positive; unconditional: a categorical statement 2. relating to or included in a category 3. (logic) another word for categorial adj. […]
[kuh-thahr-tik] /kəˈθɑr tɪk/ adjective 1. of or relating to . 2. Also, cathartical. evacuating the bowels; purgative. noun 3. a purgative. /kəˈθɑːtɪk/ adjective 1. purgative 2. effecting catharsis noun 3. a purgative drug or agent adj. 1610s, of medicines, from Latin catharticus, from Greek kathartikos “fit for cleansing, purgative,” from katharsis “purging, cleansing” (see catharsis). […]
[kath-uh-lik, kath-lik] /ˈkæθ ə lɪk, ˈkæθ lɪk/ adjective 1. of or relating to a Catholic church, especially the Roman Catholic Church. 2. Theology. 3. pertaining to the Western Church. noun 4. a member of a Catholic church, especially of the . adjective 1. not of or relating to the Roman Catholic Church noun 2. a […]