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Definitions and Synonyms of archean | Another word for archean | What is archean?

Definition 1: the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life - [noun denoting time]

Synonyms for archean in the sense of this definition

(archean is an instance of ...) the longest division of geological time

(... is part of archean) the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

Definition 2: of or relating to the earliest known rocks formed during the Precambrian Eon - [adjective satellite denoting all]

Synonyms for archean in the sense of this definition

(archean is similar to ...) at or near the beginning of a period of time or course of events or before the usual or expected time

"early morning" "an early warning" "early diagnosis" "an early death" "took early retirement" "an early spring" "early varieties of peas and tomatoes mature before most standard varieties"

(archean belongs to category ...) a science that deals with the history of the earth as recorded in rocks

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