Definition of archaean Archaean
Ar•chae•an
We found 5 definitions of archaean from 4 different sources.
Advertising
What does archaean mean?
WordNet
Adjective |
||
| archaean - of or relating to the earliest known rocks formed during the Precambrian Eon | ||
| archean | ||
| early 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" | ||
| geology a science that deals with the history of the earth as recorded in rocks | ||
= synonym
= antonym
= related word
= antonym
= related word
Wiktionary 
- archaean (Adjective)
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.
Webster DictionaryWebster's Unabridged Dictionary 📘
- archaean (a.)
Ancient; pertaining to the earliest period in geological history. - archaean (n.)
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.
