tortoise-core

tortoise-core
/tawr"teuhs kawr', -kohr'/, n.
Archaeol. 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.
[1915-20]

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Universalium. 2010.

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  • Levallois technique — The Levallois technique is a name given by archaeologists to a distinctive type of flint knapping developed by humans during the Palaeolithic period.It is named after nineteenth century finds of flint tools in the Levallois Perret… …   Wikipedia

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  • turtleback — I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun Etymology: turtle (II) + back : a raised convex surface: as a. : an oval boss especially on furniture b. : a raised obstruction sometimes illuminated and placed in the pavement at a street intersection for the guidance of… …   Useful english dictionary

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