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fenster

American  
[fen-ster] / ˈfɛn stər /

noun

Geology.

  1. an erosional break in an overthrust rock sheet, exposing the rocks that underlie the sheet.

Etymology

Origin of fenster

1920–25; < German: literally, window; Old High German fënster < Latin fenestra

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.