Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Noun: Precambrian aeon
  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