Primordial
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Of or pertaining to the lowest beds of the Silurian age,corresponding to the Acadian and Potsdam periods in American geology.It is called also Cambrian, and by many geologists is separated fromthe Silurian.
Primordial meaning & definition 1 of Primordial.
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existing at or since the beginning of the world or the universe:
Primordial meaning & definition 2 of Primordial.