Related Clues:
- A gazillion years, seemingly
- Seemingly endless time
- Many a doctor's office wait, seemingly
- Billion-year span
- Twenty bajillion years
- Millions of lifetimes
- Great geological time span
- Geological age
- Some hesitation in retrospectively entering painter's age
- Quasi-opposite of ''flash''
- Proterozoic ___
- No end of time
- Geologist's unit
- Many, many epochs
- It's a long time