proterozoic : Idioms & Phrases


proterozoic aeon

  • noun from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
    Proterozoic aeon; Proterozoic.
WordNet

proterozoic eon

  • noun from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
    Proterozoic aeon; Proterozoic.
WordNet