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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - From 544 million to about 230 million years ago.

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Usage examples (39)
  • They are folded and faulted, and are of Paleozoic age.
  • Precambrian and Paleozoic rock underlies Ecoregion 66d.
  • Two great animal faunas dominated the seas during the Paleozoic.
  • Paleozoic marine and nearshore deposits underlie much of the region.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.