Crossword puzzle clue "lengthy units of time"

Here are the possible solutions for lengthy units of time 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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