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

• profuse
• profusely
• profuseness
• profusion
• prog
• progenitor
• progeny
• progeria
• progestational
• progesterone
• progestin
• progestogen
• prognathic
• prognathism
• prognathous
• Progne
• Progne subis
• prognosis
• prognostic
• prognosticate
• prognostication
• prognosticative
• prognosticator
• program
• program development cycle