Crossword Genius

Geological age (3)

Ross

I believe the answer is:

eon

'geological age' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for eon that I've seen before include "In time, long division" , "Prolonged period" , "billion years" , "Major division of geological time" , "Very long age" .)

I've seen this clue in the Universal, the Evening Standard, The Telegraph, The Washington Post and the L.A. Times Daily.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.