archaean
English Thesaurus
1. of or relating to the earliest known rocks formed during the Precambrian Eon (adj.all)
| similar | : | early, |
| definition | : | at or near the beginning of a period of time or course of events or before the usual or expected time (adj.all) |
| domain category | : | geology, |
| definition | : | a science that deals with the history of the earth as recorded in rocks (noun.cognition) |
| derivation | : | archaeozoic, archaeozoic aeon, archean, archean aeon, archean eon, archeozoic, archeozoic eon, |
| definition | : | 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.time) |
| derivation | : | archaeozoic, archaeozoic aeon, archean, archean aeon, archean eon, archeozoic, archeozoic eon, |
| definition | : | 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.time) |
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