About The Word Archaean

Bay Area Crosswords

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Archaean

Archaean Meaning & Definition
Archaean Definition And Meaning

What's The Definition Of Archaean?

[adj] (geology) used of the earliest known rocks

Synonyms | Synonyms for Archaean: archean | early

Related Terms | Find terms related to Archaean:

See Also |

Archaean In Webster's Dictionary

\Ar*ch[ae]"an\, a. [Gr. 'archai^os ancient, fr. 'archh` beginning.] Ancient; pertaining to the earliest period in geological history.
\Ar*ch[ae]"an\, n. (Geol.) The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of life, and an Eozoic age, including the earliest forms of life. Note: This is equivalent to the formerly accepted term Azoic, and to the Eozoic of Dawson.

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