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)

• Danish: arkeisk
• Finnish: arkeeinen (fi)
• Greek: αρχαιοζωικός (archaiozoïkós)
• Irish: Aircéach
• Italian: archeano (it)
• (deprecated template usage) {{trans-mid}}
• Norwegian:

  Bokmål: arkeisk

  Nynorsk: arkeisk

• Portuguese: arqueano
• Russian: архе́йский (ru) (arxéjskij)
• Spanish: arcaico (es)
• Swedish: arkeisk (sv)

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
• (deprecated template usage) {{trans-mid}}
• Greek: Αρχαιοζωικός m (Archaiozoïkós)
• Portuguese: Arqueano m
• Russian: архе́й (ru) m (arxéj)
• Spanish: Arcaico m
• Swedish: arkeikum (sv) c

See also

• Appendix:Geologic timescale

Further reading

• Archaean on Wikipedia.Wikipedia