Archaean

Etymology
From, neuter plural of.

Adjective

 * 1)  Of, or relating to the geologic eon from about 3,800 to 2,500 million years ago; comprises the Eoarchean, Paleoarchean, Mesoarchean and Neoarchean eras; marked by an atmosphere with little oxygen, the formation of the first continents and oceans and the emergence of simple life.

Translations

 * Catalan: arqueà
 * Chinese:
 * Mandarin: 太古代的
 * Danish: arkeisk
 * Finnish:
 * Greek: αρχαιοζωικός
 * Irish: Aircéach
 * Italian:
 * Norwegian:
 * Bokmål: arkeisk
 * Nynorsk: arkeisk
 * Portuguese: arqueano
 * Russian:
 * Spanish:
 * Swedish:

Proper noun

 * 1)  The eon from 2,500 Ma to 4,000 Ma.

Coordinate terms

 * , - eons in Precambrian

Translations

 * Catalan: arqueà
 * Chinese:
 * Mandarin:
 * Czech: prahory, archaikum
 * Estonian: arhaikum, ürgaegkond, ürgeoon
 * Finnish: arkeeinen aioni
 * Greek: Αρχαιοζωικός
 * Hungarian:
 * Polish:
 * Portuguese: Arqueano
 * Russian:
 * Spanish: Arcaico
 * Swedish: