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eugeosyncline

American

[yoo-jee-oh-sing-klahyn, -sin-] / yuˌdʒi oʊˈsɪŋ klaɪn, -ˈsɪn- /

noun

Geology.

a former marine zone, bordering an ocean basin, marked by very thick deposits of sediment in which the products of volcanic activity are associated with clastic sediments.

Other Word Forms

Derived Forms

eugeosynclinal

adjective

Etymology

Origin of eugeosyncline

First recorded in 1940–45; eu- + geosyncline

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.