Search Result：Precambrian period
precambrian period 
(TTS Sound)
(TTS Sound)Overview of noun precambrian_period
The noun precambrian period has 1 sense
- Precambrian, Precambrian eon, Precambrian aeon, Precambrian period -- (the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago)