Precambrian aeon

Precambrian aeon
noun
the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
Instance Hypernyms: ↑eon, ↑aeon
Part Meronyms:

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  • Precambrian eon — noun the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago • Syn: ↑Precambrian, ↑Precambrian aeon, ↑Precambrian period • Instance Hypernyms: ↑eon, ↑aeon • Part Meron …   Useful english dictionary

  • Precambrian period — noun the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago • Syn: ↑Precambrian, ↑Precambrian eon, ↑Precambrian aeon • Instance Hypernyms: ↑eon, ↑aeon • Part Meronyms …   Useful english dictionary

  • Precambrian — ► ADJECTIVE Geology ▪ relating to the earliest aeon of the earth s history, preceding the Cambrian period and ending about 570 million years ago, a time when living organisms first appeared …   English terms dictionary

  • Precambrian — [pri: kambrɪən] adjective Geology relating to or denoting the earliest aeon of the earth s history, preceding the Cambrian period and ending about 570 million years ago (comprising the Archaean and Proterozoic aeons) …   English new terms dictionary

  • Archaeozoic aeon — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean eon, ↑Archean aeon, ↑Archeozoic, ↑Archaeozoic, ↑Archeozoic eon • Derivationally… …   Useful english dictionary

  • Archean aeon — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean eon, ↑Archeozoic, ↑Archaeozoic, ↑Archeozoic eon, ↑Archaeozoic aeon •… …   Useful english dictionary

  • Proterozoic aeon — noun from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms • Syn: ↑Proterozoic, ↑Proterozoic eon • Derivationally related forms: ↑proterozoic (for: ↑Proterozoic) …   Useful english dictionary

  • Archeozoic — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean eon, ↑Archean aeon, ↑Archaeozoic, ↑Archeozoic eon, ↑Archaeozoic aeon •… …   Useful english dictionary

  • Archaeozoic — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean eon, ↑Archean aeon, ↑Archeozoic, ↑Archeozoic eon, ↑Archaeozoic aeon •… …   Useful english dictionary

  • Archean eon — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean aeon, ↑Archeozoic, ↑Archaeozoic, ↑Archeozoic eon, ↑Archaeozoic aeon •… …   Useful english dictionary

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