archeozoic

Noun
  1. The time from 3,800 million years to 2,500 million years ago;
    Earth's crust formed;
    Unicellular organisms are earliest forms of life (synset 115154172)
    is an instance of: aeon, eon - the longest division of geological time
    is a part of: precambrian, precambrian aeon, precambrian eon, 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
    same as: archaeozoic, archaeozoic aeon, archean, archean aeon, archean eon, archeozoic eon
Adjective
  1. Of or belonging to earlier of two divisions of the Precambrian era (synset 300817820)
    "archeozoic life forms"
    referred to in: geology - a science that deals with the history of the earth as recorded in rocks
    similar to: early - at or near the beginning of a period of time or course of events or before the usual or expected time
    same as: archaeozoic

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