Many millennia (4)
'many millennia' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eons that I've seen before include "Endless periods" , "Times" , "Years and years" , "Divisions of archaeological time" , "Very long periods (US)" .)
'many millennia' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aeon that I've seen before include "Indefinitely long period of time" , "A very long time, an age" , "Eternity" , "An age; period" , "Vast age" .)