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

Proterozoic

9.9
Relating to the period 2,500 to 544 million years ago when oxygen rose and multicellular life appeared
  • adjective
  • /ˌprɒtəˈroʊzaɪk/
  • Specialized
translation icon : proterozoico
  • Scientists study rocks from the Proterozoic era to understand the evolution of life before the Cambrian explosion.

Examples

  • The geological record shows that the Proterozoic saw significant changes in the atmosphere due to oxygen buildup.

  • Closer to Proterozoic Earth than today's Mars.

    Life (2017)

  • During the Proterozoic period, the first multicellular organisms began to emerge in Earth's oceans.

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 positive

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 when something is called Proterozoic it means it is from that early part of Earth's history when life was becoming more complex.