tortoise-core
[tawr-tuh s-kawr, -kohr]
noun
Archaeology. a late Lower and Middle Paleolithic stone core characteristic of the Levalloisian tradition of toolmaking, having a rounded top and flattish bottom and prepared in advance to permit the removal of a single ellipsoid flake with one blow from a stone hammer.
Origin of tortoise-core
First recorded in 1915–20
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019