1. The eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
   - Precambrian eon, Precambrian aeon, Precambrian period

Type of: aeon, eon

Encyclopedia: Precambrian

• borax
• borborygmus
• Bordeaux
• Bordeaux mixture
• Bordeaux wine
• bordelaise
• bordello
• border
• Border collie
• border district
• border on
• border patrol
• border patrolman
• Border terrier
• bordereau
• bordered
• borderer
• borderland
• borderline
• borderline intelligence
• borderline schizophrenia
• bore
• bore bit
• bore-hole
• boreal