doorstone

[ dawr-stohn, dohr- ]
/ ˈdɔrˌstoʊn, ˈdoʊr- /

noun

a stone serving as the sill of a doorway.

Origin of doorstone

First recorded in 1755–65; door + stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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