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proterozoic

2 senses · Free VividLex dictionary · Thesaurus

  1. 1. adj. formed in the later of two divisions of the Precambrian era Source: wordnet
  2. 2. n. from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms s. formed in the later of two divisions of the Precambrian era Source: ecdict

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