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[ham-er-stohn] /ˈhæm ərˌstoʊn/

noun, Archaeology.
an ancient stone tool used as a hammer, as for chipping flint, processing food, or breaking up bones.
a stone used as a hammer in the production of tools during the Acheulian period
A hand-held stone or cobble used by hominids perhaps as early as 2.5 million years ago as a crude pounding or pecking tool. Hammerstones were also used by early humans in striking flakes from stone cores to produce core tools.


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