Crossword Genius

Extremely long period (3)

Ross

I believe the answer is:

eon

(Other definitions for eon that I've seen before include "Age, epoch" , "Vast age; eternity" , "Long period of time" , "An immense time" , "Era" .)

I've seen this clue in the Newsday.
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.