Archeozoic

or Ar·chae·o·zo·ic

[ ahr-kee-uh-zoh-ik ]

/ ˌɑr ki əˈzoʊ ɪk /

Geology

adjective

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.

noun

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. 2019

Examples from the Web for archeozoic

During the Archeozoic, no evidence of glaciation has yet been discovered.
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
I believe that our sun could not have been a typical nova, at least not since the Archeozoic, that is for perhaps a billion years.
Climatic Changes|Ellsworth Huntington
Archeozoic , the era in which the simplest forms of life originated.
Unexplored!|Allen Chaffee

The early and middle Proterozoic strata throw no more light upon the early history of animal life than do the Archeozoic strata.
Geology|William J. Miller

British Dictionary definitions for archeozoic

Archeozoic

/ (ˌɑːkɪəˈzəʊɪk) /

adjective

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

Science definitions for archeozoic

Archeozoic

See Archean.