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Glite Dictionary
🦠 A long eon 🦠 Relating to ancient time
Proterozoic

Proterozoic

9.9
A long time in Earth's history 2,500 to 544 million years ago when oxygen rose and multicellular life appeared
  • noun
  • /ˌprɒtəˈroʊzɔɪk/
  • Specialized
translation icon : proterozoico
  • During the Proterozoic, oxygen began to accumulate in the atmosphere.

Examples

  • During the Proterozoic, early forms of multicellular life began to evolve.

  • The Proterozoic eon witnessed significant changes in Earth's atmosphere.

  • Many of Earth's oldest rocks date back to the Proterozoic period.

  • The Proterozoic eon is crucial for understanding Earth's history.

  • During the Proterozoic, early forms of multicellular life began to evolve.

  • Many of Earth's oldest rocks date back to the Proterozoic period.

  • The Proterozoic eon witnessed significant changes in Earth's atmosphere.

Synonyms

Proterozoic eon
vsProterozoic
  • Specialized
9.9

A very long period in Earth's history from about 2,500 to 544 million years ago when simple life appeared

emphasizes atmospheric oxygen increase rather than focusing on specific organisms

Compounds

Proterozoic eon
  • Specialized
9.9

A very long period in Earth's history from about 2,500 to 544 million years ago when simple life appeared

Surface Forms

Proterozoic singular
Proterozoics plural

Morphology

Proterozoic = protero + zoic

Built from Greek combining forms 'protero-' (earlier) + '-zoic' (life); these are specialized combining forms rather than familiar standalone English words, so the meaning is not derivable by an average B1 learner.

Etymology

Proterozoic comes from Greek parts protero- 'earlier' and -zoic 'life', the same root you see in zoo and zoology. So Proterozoic names a very early time on Earth when simple life began to appear and change.