foredeep

[ fawr-deep, fohr- ]
/ ˈfɔrˌdip, ˈfoʊr- /

noun Geology.

an elongate sediment-filled sea-floor depression bordering an island arc or other orogenic belt.

Origin of foredeep

First recorded in 1905–10; fore- + deep
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019