Used of the earliest known rocks
Noun
the time from 3,800 million years to 2,500 million years ago; earth''s crust formed; unicellular organisms are earliest forms of life
Adjective S.
used of the earliest known rocks
Usage Examples
Archean, Archean, rchean, Archean, Aerchean, A4rchean, A5rchean, Atrchean, Afrchean, Aechean, A4chean, A5chean, Atchean, Afchean, Arechean, Ar4chean, Ar5chean, Artchean, Arfchean, Arxchean, Ardchean, Arfchean, Arvchean, Ar chean, Arxhean, Ardhean, Arfhean, Arvhean, Ar hean, Arcxhean, Arcdhean, Arcfhean, Arcvhean, Arc hean, Arcghean, Arcyhean, Arcuhean, Arcjhean, Arcnhean, Arcgean, Arcyean, Arcuean, Arcjean, Arcnean, Archgean, Archyean, Archuean, Archjean, Archnean, Archwean, Arch3ean, Arch4ean, Archrean, Archsean, Archdean, Archwan, Arch3an, Arch4an, Archran, Archsan, Archdan, Archewan, Arche3an, Arche4an, Archeran, Archesan, Archedan, Archeqan, Archewan, Archesan, Archezan, Archeqn, Archewn, Archesn, Archezn, Archeaqn, Archeawn, Archeasn, Archeazn, Archeabn, Archeahn, Archeajn, Archeamn, Archea n, Archeab, Archeah, Archeaj, Archeam, Archea , Archeanb, Archeanh, Archeanj, Archeanm, Archean .