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catalyses

 [kuh-tal-uh-sis]   Origin

ca·tal·y·sis

   [kuh-tal-uh-sis]
noun, plural -ses  [-seez] .
1.
Chemistry. the causing or accelerating of a chemical change by the addition of a catalyst.
2.
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.
Origin:
1645–55; < Neo-Latin < Greek katálȳsis dissolution, equivalent to katalȳ́(ein) to dissolve (kata- cata- + lȳ́ein to loosen) + -sis -sis

Related forms
cat·a·lyt·ic  [kat-l-it-ik] , adjective, noun
cat·a·lyt·i·cal, adjective
cat·a·lyt·i·cal·ly, adverb
an·ti·cat·a·lyt·ic, adjective, noun
an·ti·cat·a·lyt·i·cal·ly, adverb
EXPAND
non·cat·a·lyt·ic, adjective, noun
non·cat·a·lyt·i·cal·ly, adverb
self-ca·tal·y·sis, noun
sem·i·cat·a·lyt·ic, adjective
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Catalyses is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a chattering or flighty, light-headed person.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
Dictionary.com Unabridged

cat·a·lyze

   [kat-l-ahyz]
verb (used with object), -lyzed, -lyz·ing.
to act upon by catalysis.
Also, especially British, cat·a·lyse.

Origin:
1885–90; cataly(sis) + (-i)ze

Related forms
cat·a·lyz·er, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To catalyses
Etymonline
Word Origin & History

catalysis
1655, "dissolution," from Gk. katalysis "dissolution," from katalyein "to dissolve," from kata- "down" + lyein "to loosen" (see lose). Chemical sense is attested from 1836.
EXPAND

catalyze
1890, from catalysis on model of analyze/analysis.
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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.

catalyze cat·a·lyze (kāt'l-īz')
v. cat·a·lyzed, cat·a·lyz·ing, cat·a·lyz·es
To modify, especially to increase, the rate of a chemical reaction by catalysis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
catalyze   (kāt'l-īz')  Pronunciation Key 
To modify, especially to increase, the rate of a chemical reaction through the action of a catalyst.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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