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, Precambrian eon, Precambrian aeon

Type of: aeon, eon

• recitalist
• recitation
• recitative
• recite
• reciter
• reck
• reckless
• recklessly
• recklessness
• reckon
• reckoner
• reckoning
• reclaim
• reclaimable
• reclaimed
• Myrtus communis
• myself
• Mysidacea
• Mysidae
• Mysis
• Mysoline
• mysophilia
• mysophobia
• mysophobic
• Mysore