noun
- Plural of hornstone; hard, fine-grained sedimentary rocks, typically siliceous, that break with a sharp edge and were historically used to make tools and start fires.
Usage: geology; archaeology
Examples
- Archaeologists discovered hornstones among the artifacts at the prehistoric site.
- The ancient peoples shaped hornstones into sharp blades for hunting.
- Hornstones were valued for their ability to produce sparks when struck.
- The museum's collection includes several well-preserved hornstones from the Stone Age.