sarsen

/ˈsɑrsən/
noun
  1. A large, hard sandstone boulder, especially one found in southern England, often used in ancient monuments like Stonehenge.
    • The upright sarsens at Stonehenge each weigh about 25 tons.
    • Many sarsen stones lie scattered across the Marlborough Downs.
    • The ancient builders dragged the massive sarsen across the plain to the construction site.
Synonyms
What does "sarsen" mean? | whatsthatwordmean | whatsthatwordmean