English
Detailed Synonyms for Proterozoic eon in English
Proterozoic eon:
Proterozoic eon [the ~] noun
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the Proterozoic eon
– from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms 1the Proterozoic; the Proterozoic aeon; the Proterozoic eon– from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms 1