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