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Definition of Proterozoic eon
1. Noun. From 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms.
Exact synonyms: Proterozoic, Proterozoic Aeon
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Proterozoic
Group relationships: Precambrian, Precambrian Aeon, Precambrian Eon, Precambrian Period
Generic synonyms: Aeon, Eon
Derivative terms: Proterozoic
Lexicographical Neighbors of Proterozoic Eon
Literary usage of Proterozoic eon
Below you will find example usage of this term as found in modern and/or classical literature:
1. Traveling America's Loneliest Road: A Geologic and Natural History Tour by Joseph V. Tingley, Kris Ann Pizarro (2000)
"Azoic, was, until recently, thought to be without life; the Proterozoic eon was
the time of "early life"; the Phanerozoic Eon, which extends to the present, ..."
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