English
Eozoic
eo- + -zoic
Formed from eo- + -zoic
Proto-Indo-European *h₂ews- ‘to dawn’
Proto-Indo-European *h₂éwsōs ‘dawn’
Proto-Hellenic *auhṓs ‘dawn’
Ancient Greek ἠώς ‘dawn’
English eo-
Today it means
adj Precambrian, or more specifically Archaean.
Language periods are conventional ranges, not dates for this word.
Etymograph / Eozoic