archaean
IPA: ɑrkiʌn
Root Word: Archaean
noun
- (geology) The eon from 2,500 Ma to 4,000 Ma.
- (biology) Any organism of the domain Archaea.
adjective
- (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.
Advertisement
Examples of "archaean" in Sentences
No Sentences Found for archaean
Advertisement
Advertisement