Proterozoic
(Pro-ter-o-zo-ic)
5 syllables
Definition
adjective. Relating to or denoting the eon that constitutes the latter part of the Precambrian, between the Archean eon and the Phanerozoic eon, characterized by the appearance of the first stable continents and the first abundant fossils of living organisms.
Example Sentence
The Proterozoic eon was marked by significant geological and biological changes.
More Example Sentences
During the Proterozoic, the Earth's atmosphere became oxygen-rich.
Synonyms
Antonyms
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Proterozoic
