noun
Precambrian era
Geological term for the time before the Cambrian period, covering most of Earth's history.
先カンブリア時代の岩石から初期の生命の痕跡が見つかった。
Traces of early life were found in rocks from the Precambrian era.
The Cambrian period, which follows the Precambrian era.
Compound of 先 (pre-) + カンブリア (Cambrian) + 時代 (era).