Proterozoic

See also: proterozoic

English

Etymology

From protero- +‎ -zoic.

Pronunciation

  • (US) IPA(key): /ˌpɹoʊt(ə)ɹrəˈzoʊɪk/, /ˌpɹoʊt(ə)ɹoʊˈzoʊɪk/
  • (UK) IPA(key): /ˌpɹɒt(ə)ɹəˈzəʊɪk/, /ˌpɹɒt(ə)ɹəʊˈzəʊɪk/
  • Audio (Southern England):(file)
  • Rhymes: -əʊɪk

Adjective

Proterozoic (not comparable)

  1. (geology) Of or relating to the geologic eon from 2,500 Ma to 541.0±1.0 Ma.

Translations

Proper noun

Proterozoic

  1. (geology) The eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.
    Hypernym: (eon/supereon) Precambrian
    Hyponyms: Paleoproterozoic, Mesoproterozoic, Neoproterozoic
    Coordinate terms: (preceding eon) Archaean, (succeeding eon) Cambrian

Translations

See also

  • Appendix:Geologic timescale
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