Word:

Archean

Noun1.Archean - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Adj.1.archean - used of the earliest known rocks
Synonyms: archaean
archaean, early, geology
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Archbishopric
ArchBSD
Archbutler
Archchamberlain
Archchancellor
Archchemic
Archdeacon
Archdeaconry
Archdeaconship
archdiocesan
Archdiocese
Archducal
Archduchess
Archduchy
Archduke
Archdukedom
-- Archean --
Archean aeon
Archean eon
Archebiosis
Arched
Archegonial
archegoniate
Archegonium
Archegony
Archelogy
Archencephala
Archenemy
Archenteric
Archenteron
archeobacteria
archeologic
archeological
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