Clue: Long time, geologically

Answer: EON

Length: 3

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Similar Clues:

• Longest time span, geologically (EON with 3 letters)
• Long time (e.g. AEON with 4 letters)
• Long, long time (e.g. AEON with 4 letters)
• Very long time (e.g. AEON with 4 letters)
• A long time (e.g. AEON with 4 letters)
• A long, long time (e.g. AEON with 4 letters)
• Really long time (e.g. AEON with 4 letters)
• Quite a long time (e.g. AEON with 4 letters)
• Extremely long time (e.g. AEON with 4 letters)
• Long period of time (e.g. AEON with 4 letters)