Crossword puzzle clue "lengthy time units"

Here are the possible solutions for lengthy time units clue

Answer
Clue
Relevancy
eons
Clue
Lengthy time units
Lengthy units of time
Definition
EON, a long period of time, also AEON
eon
Clue
Lengthy time
Very lengthy stretch of time
Lengthy time span
Incalculably lengthy span of time
Definition
a long period of time, also AEON
epochs
Clue
Lengthy time periods
Definition
EPOCH, an important period of time, also EPOCHA
era
Clue
Lengthy time period, historically
Definition
a main division of geological time

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