Proterozoic Eon — synonyms, definition
1. Proterozoic eon (Noun)
2 synonyms
Proterozoic Proterozoic aeon
1 definition
Proterozoic eon (Noun) — From 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms.
2 types of
aeon eon
4 parts of
Precambrian Precambrian aeon Precambrian eon Precambrian period