One of several large masses of silicified sandstone or conglomerate found on or near the ground surface in England and Brittany and believed to be the erosional remains of a sedimentary bed deposited during the Tertiary Period. These masses were used by Neolithic peoples as monoliths.
[Short for Sarsen stone, from Early Modern English Sarsen, variant of Saracen, Saracen, heathen, pagan (perhaps in reference to the use of sarsens in ancient monuments); see SARACEN.]
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