hammerstone

American  

[ham-er-stohn] / ˈhæm ərˌstoʊn /

noun

Archaeology.

1. an ancient stone tool used as a hammer, as for chipping flint, processing food, or breaking up bones.

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hammerstone British  

/ ˈhæməˌstəʊn /

noun

1. a stone used as a hammer in the production of tools during the Acheulian period

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hammerstone Scientific  

/ hăm′ər-stōn′ /

1. 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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Example Sentences

Fragment of hammerstone of gray micaceous sandstone, 5 inches long by 3 inches in diameter.

From Illustrated Catalogue of a Portion of the Collections Made During the Field Season of 1881 Third Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1881-82, Government Printing Office, Washington, 1884, pages 427-510 by Holmes, William Henry

On the other hand, in the same crannog, a hammerstone broken in two was found, each half in a different place, as were two parts of a figurine at Dumbuck. 

From The Clyde Mystery a Study in Forgeries and Folklore by Lang, Andrew