411 REFERENCE · Wiktionary
Archæozoic
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Archaeozoic
English
Proper noun
en Archaeozoic.
Adjective
-
en Archaeozoic.
en 1922 John Arthur Thomson The Outline of Science I 90 http://books.google.com/books?id=tSNRAAAAYAAJ&hl=en&pg=PA90#v=onepage&q&f=false It is an astounding fact that at least half of geological time (the Archæozoic and Proterozoic eras) passed before there were living creatures with parts sufficiently hard to form fossils.