• synonyms


or Ar·chae·o·zo·ic

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  1. noting or pertaining to the earlier half of the Precambrian Era, from about 5 billion to 2.5 billion years ago, during which the earliest datable rocks were formed and from which the oldest known fossil forms, blue-green algae and bacteria, have been recovered.
  1. the Archeozoic division of geologic time or the rock systems formed then.

Origin of Archeozoic

1870–75; archeo- + Greek zō(ḗ) life + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for archeozoic

Historical Examples

  • But how may we separate the Proterozoic rocks from the Archeozoic?


    William J. Miller

  • During the Archeozoic, no evidence of glaciation has yet been discovered.

    Climatic Changes

    Ellsworth Huntington

  • Archeozoic , the era in which the simplest forms of life originated.


    Allen Chaffee

  • Even in the Archeozoic the rocks testify to a climate seemingly not greatly different from that of the average of geologic time.

    Climatic Changes

    Ellsworth Huntington

  • Archeozoic rocks have been studied minutely over a very small percentage of the earth's land surface.

    Climatic Changes

    Ellsworth Huntington

British Dictionary definitions for archeozoic


  1. a variant spelling (esp US) of Archaeozoic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

archeozoic in Science


  1. See Archean.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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