precambrian eon

1. The eon following the Hadean time and preceding the Phanerozoic eon;
   From about 3,800 million years ago until 544 million years ago (synset 115153663)
   is an instance of: aeon, eon - the longest division of geological time
   has:

   • proterozoic, proterozoic aeon, proterozoic eon - from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
   • archaeozoic, archaeozoic aeon, archean, archean aeon, archean eon, archeozoic, archeozoic eon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
   same as: precambrian, precambrian aeon, precambrian period

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