Examples from the Web for trilithon
One upright of the great Trilithon (raised and made secure in 1901) is erect.
He took the boy across to the trilithon, and made him kneel down.
He then went a second time to the hollow behind the trilithon, remaining there nearly a quarter of an hour.
The building of the group was continuous and no gap separates the Trilithon from the foreign upright.
There is a rude circle of menhirs at the site, with a trilithon or dolmen on one side.Palestine|Claude Reignier Conder