Cromlech

n.

1.

(Archæol.) A monument of rough stones composed of one or more large ones supported in a horizontal position upon others. They are found chiefly in countries inhabited by the ancient Celts, and are of a period anterior to the introduction of Christianity into these countries.

Noun

1.

cromlech - a prehistoric megalith typically having two upright stones and a capstone Synonyms: dolmen

dolmen, megalith, megalithic structure