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Archaeozoic

adverb

1) Like or belonging to the earliest forms of animal life.

Examples Sentences for

Archaeozoic

1) The Archean -LRB- , also spelled Archaean , formerly called the Archaeozoic -LRB- -RRB- , also spelled Archeozoic or Archæozoic -RRB- is a geologic eon before the Paleoproterozoic Era of the Proterozoic Eon , before 2.5 Ga -LRB- billion years ago , or 2,500 -RRB-