sarsen
noun
sar·sen
ˈsärsᵊn
plural -s
: a large loose residual mass of stone left after the erosion of a once continuous bed or layer
specifically : one of the large sandstone blocks scattered over the English chalk downs
called also druid stone
Word History
Etymology
short for sarsen stone, alteration of Saracen stone, i.e., a pagan stone or monument