Clue: Billion-year span

Answer: EON

Length: 3

---

Similar Clues:

• Verb in first-year Spanish (ESTA with 4 letters)
• Year of the first Spanish settlement in Cuba (MDXI with 4 letters)
• Billion years (Var.) (AEON with 4 letters)
• A billion years, geologically (EONS with 4 letters)
• One billion years, geologically (e.g. EON with 3 letters)
• Book that spans 2,369 years (GENESIS with 7 letters)
• Billions of years (EONS with 4 letters)
• Billion-year periods (EONS with 4 letters)
• Author whose novels span 6,000 years (ANNERICE with 8 letters)
• Year-span separator (ENDASH with 6 letters)