English
heliolithic
From helio- + lithic.
Proto-Indo-European *sóh₂wl̥ ‘sun’
Proto-Hellenic *hāwélios ‘sun’
Ancient Greek ἥλιος ‘sun’
English helio-
Today it means
adj of a civilization characterized by megaliths and sun-worship
Language periods are conventional ranges, not dates for this word.
Etymograph / heliolithic