Archaean

Definition

Of or relating to Arche, the Muse of beginnings in Greek mythology.

Etymology

From Ancient Greek ἀρχαῖα (arkhaîa, “ancient”), neuter plural of ἀρχαῖος (arkhaîos, “ancient”).

Example Sentences

• "The oldest vestiges of continental crust, which date from the Archaean aeon about 4 billion years ago, are in Acasta in north-west Canada."