Crossword puzzle clue "long and important historical period"

Here are the possible solutions for long and important historical period clue

Answer
Clue
Relevancy
eon
Clue
Long long long long long long long time
Long, long, long time period
Definition
a long period of time, also AEON
era
Clue
Long and important historical period
Important historical period
Important historical time
Definition
a main division of geological time
epoch
Clue
Important historical period
Definition
an important period of time, also EPOCHA
cstmdsgnr
Clue
One with an important role in the production of a fantasy film or period drama (not so important for a porno, though)
dynasty
Clue
With 23, Historical period when negative numbers and paper were invented
Definition
a succession of rulers from the same line of descent

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