Archaean

Archaean

See also: archaean and Archæan

English

Alternative forms

• Archean
• Archæan (archaic)

Etymology

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

Adjective

Archaean (not comparable)

1. (geology) 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

of eon from 3,800 to 2,500 million years ago

Catalan: arqueà Chinese: Mandarin: 太古代的 (Tàigǔdài de) Finnish: arkeeinen (fi) Greek: αρχαιοζωικός (archaiozoikós) Irish: Aircéach Italian: archeano (it)

Norwegian: Bokmål: arkeisk Nynorsk: arkeisk Portuguese: arqueano Russian: архе́йский (ru) (arxéjskij) Spanish: please add this translation if you can

Proper noun

Archaean

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

Hypernyms

• (eon 2,500-4,000 Ma): Precambrian

Hyponyms

• (eon 2,500-4,000 Ma): Eoarchaean, Paleoarchaean, Mesoarchaean, Neoarchaean

Coordinate terms

• (eon 2,500-4,000 Ma): Hadean, Proterozoic - eons in Precambrian

Translations

Archaean eon

Catalan: arqueà m Chinese: Mandarin: 太古代 (zh) (Tàigǔdài) Czech: prahory f pl, archaikum n Estonian: arhaikum, ürgaegkond, ürgeoon

Finnish: arkeeinen aioni Greek: Αρχαιοζωικός m (Archaiozoikós) Portuguese: Arqueano m Russian: архе́й (ru) m (arxéj) Spanish: please add this translation if you can

See also

• Appendix:Geologic timescale

Further reading

• Archaean on Wikipedia.Wikipedia