Of or relating to the earliest known rocks formed during the Precambrian Eon
Adjective S.
used of the earliest known rocks
a.
Ancient; pertaining to the earliest period in geological
history.
n.
The earliest period in geological period, extending up to
the Lower Silurian. It includes an Azoic age, previous to the
appearance of life, and an Eozoic age, including the earliest forms of
life.
Usage Examples
Archaean, Archaean, rchaean, Archaean, Aerchaean, A4rchaean, A5rchaean, Atrchaean, Afrchaean, Aechaean, A4chaean, A5chaean, Atchaean, Afchaean, Arechaean, Ar4chaean, Ar5chaean, Artchaean, Arfchaean, Arxchaean, Ardchaean, Arfchaean, Arvchaean, Ar chaean, Arxhaean, Ardhaean, Arfhaean, Arvhaean, Ar haean, Arcxhaean, Arcdhaean, Arcfhaean, Arcvhaean, Arc haean, Arcghaean, Arcyhaean, Arcuhaean, Arcjhaean, Arcnhaean, Arcgaean, Arcyaean, Arcuaean, Arcjaean, Arcnaean, Archgaean, Archyaean, Archuaean, Archjaean, Archnaean, Archqaean, Archwaean, Archsaean, Archzaean, Archqean, Archwean, Archsean, Archzean, Archaqean, Archawean, Archasean, Archazean, Archawean, Archa3ean, Archa4ean, Archarean, Archasean, Archadean, Archawan, Archa3an, Archa4an, Archaran, Archasan, Archadan, Archaewan, Archae3an, Archae4an, Archaeran, Archaesan, Archaedan, Archaeqan, Archaewan, Archaesan, Archaezan, Archaeqn, Archaewn, Archaesn, Archaezn, Archaeaqn, Archaeawn, Archaeasn, Archaeazn, Archaeabn, Archaeahn, Archaeajn, Archaeamn, Archaea n, Archaeab, Archaeah, Archaeaj, Archaeam, Archaea , Archaeanb, Archaeanh, Archaeanj, Archaeanm, Archaean .