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Proterozoic

Definition from Dictionary, a free dictionary
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English

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Pronunciation

Adjective

Proterozoic (not comparable)

Positive
Proterozoic

Comparative
not comparable

Superlative
none (absolute)

  1. (geology) Of, or relating to the geologic eon from about 2,500 to 570 million years ago; comprises the Paleoproterozoic, Mesoproterozoic and Neoproterozoic eras; marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.

Proper noun

Singular
Proterozoic

Plural
-

Proterozoic

  1. (geology) The Proterozoic eon.

Translations

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