Crossword puzzle clue "era old name for earth's pre life period"

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Here are the possible solutions for era old name for earth's pre life period clue

Answer
Clue
Relevancy
azoic
Clue
__ Era: old name for Earth's pre-life period
Definition
lacking life, esp. of geological period
aeon
Clue
Era after era after era
Era after era
Definition
the largest division of geological time, composed of several eras, also EON
eon
Clue
Era after era
Era upon era
Definition
a long period of time, also AEON
ssr
Clue
Pre-Yeltsin-era letters
ara
Clue
The Era of __: period in Notre Dame sports lore
Era of ___ (period in Notre Dame football history)

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