Related Clues:

• Eon subdivision
• Stat for a starter
• Historic time piece?
• MLB figure
• Cenozoic, for one
• Paleozoic, e.g.
• Generation or more
• String of periods
• Prisoner's tally on a cell wall
• The 366 of 2000
• Past portion
• They last for hours
• Diurnal periods
• Big Band or Christian, e.g.
• Pitching statistic