Definition of Priscoan in English:

Priscoan

adjective

  • Relating 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.

    ‘during the turbulent Priscoan era, heavy metallic elements sink down to become the inner core’

noun

  • the PriscoanThe aeon that (in some schemes) constitutes the earliest part of the Precambrian, preceding the Archaean aeon.

    ‘together, the Proterozoic, Archaean, and Priscoan constitute what was formerly known as the Precambrian’

Origin

Formed irregularly from Latin priscus ‘ancient’ + -an.

Pronunciation

Priscoan

/prɪˈskəʊən/ /ˈprɪskəʊən/