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Dictionary

ca•tas•tro•phism

Pronunciation: (ku-tas'tru-fiz"um), [key]
—n. Geol.
the doctrine that certain vast geological changes in the earth's history were caused by catastrophes rather than gradual evolutionary processes.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

catastrophe theory

catatonia

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