\E`o*zo"ic\, a. [See {Eozo["o]n}.] (Geol.)
Of or pertaining to rocks or strata older than the Paleozoic,
in many of which the eozo["o]n has been found.

Note: This term has been proposed for the strata formerly
      called Azoic, and is preferred especially by those
      geologists who regard the eozo["o]n as of organic
      origin. See {Arch[ae]an}.