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1. (adj.) Archeozoic
of or pertaining to the earlier half of the Precambrian Era, before 2.5 billion years ago, when the only life forms were blue-green algae and bacteria.
2. (n.) Archeozoic
the Archeozoic division of geologic time or the rock systems formed then.
Etymology: (1870–75; archeo - + -zoic)
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| Definition of 'archeozoic' |
Princeton's WordNet |
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1. (adj) Archean, Archean eon, Archean aeon, Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic aeon
the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
2. (adj) archeozoic, archaeozoic
of or belonging to earlier of two divisions of the Precambrian era
"archeozoic life forms"
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Definitions of archeozoic 
