hammerstone
noun
ham·mer·stone ˈha-mər-ˌstōn 
: a prehistoric hammering implement consisting of a rounded stone
Example Sentences
Recent Examples on the Web Some of the more than 5,000 items include a miner’s belt designed for self-rescue, a fossil from a time when the entire gorge was an underwater home to marine life and a Native American hammerstone used to prepare food hundreds of years ago. 
From Usa Today Network And Wire Reports, USA TODAY, 20 Apr. 2022 Ancient people typically carved petroglyphs into boulders with a stone chisel and a hammerstone. Isis Davis-marks, Smithsonian Magazine, 9 Apr. 2021 Among the finds were traces of a fossilized forest 32 meters beneath the waves, including tree roots, terrestrial snail shells, and peat—plus a small flint flake and part of a broken flint hammerstone shaped by hunter-gatherers. Andrew Curry, Science | AAAS, 30 Jan. 2020 Mackie drops the hammerstone into a plastic zip-lock bag with a small piece of paper denoting its depth and location in the pit. Rafal Gerszak, Smithsonian, 19 Dec. 2019 There, the edges of the bone fragments and the impact points of the hammerstones looked more like what happened when archaeologists cracked open deer bones after a couple of weeks or longer. Kiona N. Smith, Ars Technica, 14 Oct. 2019 Most of the metapodials at Qesem were broken into fragments, and many were pitted and flaked as if they’d been hit with a hammerstone. Kiona N. Smith, Ars Technica, 14 Oct. 2019 The site’s capuchins use quartzite cobbles as hammerstones, and tree limbs and loose stones as anvils. The Economist, 27 June 2019 None of the animal bones found nearby bears cut marks or cracks from hammerstones to suggest that people were butchering any of those potentially tasty grazing animals at Shangchen. Kiona N. Smith, Ars Technica, 11 July 2018 See More
From Usa Today Network And Wire Reports, USA TODAY, 20 Apr. 2022 Ancient people typically carved petroglyphs into boulders with a stone chisel and a hammerstone. Isis Davis-marks, Smithsonian Magazine, 9 Apr. 2021 Among the finds were traces of a fossilized forest 32 meters beneath the waves, including tree roots, terrestrial snail shells, and peat—plus a small flint flake and part of a broken flint hammerstone shaped by hunter-gatherers. Andrew Curry, Science | AAAS, 30 Jan. 2020 Mackie drops the hammerstone into a plastic zip-lock bag with a small piece of paper denoting its depth and location in the pit. Rafal Gerszak, Smithsonian, 19 Dec. 2019 There, the edges of the bone fragments and the impact points of the hammerstones looked more like what happened when archaeologists cracked open deer bones after a couple of weeks or longer. Kiona N. Smith, Ars Technica, 14 Oct. 2019 Most of the metapodials at Qesem were broken into fragments, and many were pitted and flaked as if they’d been hit with a hammerstone. Kiona N. Smith, Ars Technica, 14 Oct. 2019 The site’s capuchins use quartzite cobbles as hammerstones, and tree limbs and loose stones as anvils. The Economist, 27 June 2019 None of the animal bones found nearby bears cut marks or cracks from hammerstones to suggest that people were butchering any of those potentially tasty grazing animals at Shangchen. Kiona N. Smith, Ars Technica, 11 July 2018 See More Word History
First Known Use
1872, in the meaning defined above