Proterozoic Definition

prŏtər-ə-zōĭk, prōtər-
adjective
Of, relating to, or being the most recent of the two divisions of Precambrian time, from about 2.5 billion to 542 million years ago, marked by the formation of stable continents, the buildup of oxygen, and the appearance of the first multicellular eukaryotic life forms.
American Heritage
Designating or of the geologic eon characterized by the development of sedimentary rock, shallow seas, and the first soft-bodied marine invertebrates; Precambrian, esp. late Precambrian.
Webster's New World
noun
The Proterozoic Eon.
American Heritage
Synonyms:
  • Proterozoic aeon
  • Proterozoic eon

Idioms, Phrasal Verbs Related to Proterozoic

  • the Proterozoic

Origin of Proterozoic

  • Greek proteros earlier, former per1 in Indo-European roots –zoic

    From American Heritage Dictionary of the English Language, 5th Edition

Proterozoic Sentence Examples

  • On the whole, the Proterozoic rocks are predominantly sedimentary and subordinately igneous.

  • The Proterozoic formations are unconformable on the Archean in most places where their relations are known.

  • The Proterozoic formations have a wide distribution.

  • The first of these differences between the two systems is significant of the dynamic changes suffered by the Archean before the beginning of that part of the Proterozoic era represented by known formations.

  • The Proterozoic formations have been studied in detail in few great areas.

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Words Starting With

PPRPRO

Words Ending With

CICOIC

Unscrambles

Proterozoic

Words Starting With P and Ending With C

Starts With P & Ends With CStarts With PR & Ends With CStarts With P & Ends With IC

Word Length

11 Letter Words11 Letter Words Starting With P11 Letter Words Ending With C