Related Clues:
- Extended period?
- Annoying wait, facetiously
- Untold eras
- Inconceivable stretch
- Pleistocene, e.g.
- Period on a geologic time scale
- Distinctive historical period
- Geological period (Var.)
- Very long interval
- Long while
- Charlize Theron film, '-- Flux'
- Extremely long stretch
- Almost an eternity (Var.)
- Indefinitely long period
- Geologic span