thunderstones
/ˈθʌndərˌstoʊnz/
noun
- Mythical stones or fossils once believed to be thrown down by thunder or lightning, often actually ancient tools or meteorites.
- Farmers used to keep thunderstones in their barns for good luck and protection from storms.
- The museum displayed a collection of thunderstones that were actually prehistoric arrowheads.
- In medieval times, people thought thunderstones were created when lightning struck the ground.