Proterozoic
[,prɑtərə'zoɪk]
Definition
(noun.) from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms.
(adj.) formed in the later of two divisions of the Precambrian era; 'proterozoic life forms' .
Edited by Ervin--From WordNet
Examples
- That is as true of all the minute creatures that swarmed and reproduced and died in the Arch?ozoic and Proterozoic seas, as it is of men to-day. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- Lying over and above the Proterozoic rocks is a third series, which is found to contain a considerable number and variety of traces of living things. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- This second series of rocks is called the Proterozoic (beginning of life) series, and marks a long age in the world's history. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
Editor: Oswald