A megalithic structure consisting of two upright stones and a third across the top as a lintel.
- ‘The huge Ha'amonga trilithon, made of two stone columns topped with a notched column, was built around 1200 C.E.’
- ‘Nevertheless it is most impressive and invigorating, a large oval of huge stones arranged as ‘menhirs, dolmens, trilithons and a tomb’.’
- ‘The implications for ancient engineering works aren't lost on him, and he has used his techniques to raise Stonehenge-style trilithons.’
- ‘Rock art comprising images of axes and daggers was engraved into some of the trilithons and other sarsen stones.’
Mid 18th century: from Greek, from tri- three + lithos stone.