steinkern

[ shtahyn-kern, -kurn, stahyn- ]
/ ˈʃtaɪnˌkɛrn, -ˌkɜrn, ˈstaɪn- /

noun Archaeology.

the fossilized outline of a hollow organic structure, as a skull or a mollusk shell, formed when mud or sediment consolidated within the structure and the structure itself disintegrated or dissolved.

Origin of steinkern

< German Steinkern literally, stone, pit (of a fruit), equivalent to Stein stone + Kern core, kernel
Also called endocast.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019