steinkern

noun

stein·​kern

ˈs(h)tīnˌkern

plural -s

: a fossil consisting of a stony mass that entered a hollow natural object (such as a bivalve shell) in the form of mud or sediment, was consolidated, and remained as a cast after dissolution of the mold

Word History

Etymology

German, from stein stone + kern kernel, grain, from Old High German kerno; akin to Old High German korn grain

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