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 period

Type of: aeon, eon

• toodle-pip
• tool
• tool around
• tool bag
• tool cabinet
• tool case
• tool chest
• tool kit
• tool steel
• tool-and-die work
• toolbar
• toolbox
• tooler
• toolhouse
• toolmaker
• toolshed
• toom
• toon
• Toona
• Toona calantas
• toonie
• tooshie
• toot
• tooter
• tooth