English
eonic
From eon + -ic.
A compound of eon + -ic
Proto-Indo-European *h₂eyu- ‘vital force, life, long life, eternity’
Ancient Greek αἰών ‘age, era’
Latin aeon ‘age, eternity’
English eon
Today it means
adj That lasts for an eon.
Language periods are conventional ranges, not dates for this word.
Etymograph / eonic