Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
Precambrian eon | Yes | No | No | No |
Proterozoic aeon | Yes | No | No | No |
Precambrian eon (noun) | Proterozoic aeon (noun) |
---|---|
the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago | from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms |