Crossword puzzle clue "long periods in history"

Here are the possible solutions for long periods in history clue

Answer
Clue
Relevancy
eon
Clue
Long long long long long long long time
Periods upon periods
Definition
a long period of time, also AEON
eons
Clue
Extremely long periods in geological history
Long, long periods
Definition
EON, a long period of time, also AEON
eras
Clue
Long periods in history
Very long periods of history
Definition
ERA, a main division of geological time
ages
Clue
Periods in history
Definition
AGE, to grow old
epochs
Clue
Periods of history
Definition
EPOCH, an important period of time, also EPOCHA

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