Definition of Priscoan in English:

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Priscoan

Pronunciation: /prɪˈskəʊən/
/ˈprɪskəʊən/

adjective

Geology
1Relating to or denoting the aeon that (in some schemes) constitutes the earliest part of the Precambrian, preceding the Archaean aeon. It extended from the origin of the earth to about 4,000 million years ago, and has left no identifiable rocks.
1.1 (as noun the Priscoan) The Priscoan aeon.

Origin

Formed irregularly from Latin priscus 'ancient' + -an.

For editors and proofreaders

Line breaks: Pris|coan

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