Search Result：proterozoic
proterozoic 
(TTS Sound)
(TTS Sound)Overview of noun proterozoic
The noun proterozoic has 1 sense
- Proterozoic, Proterozoic eon, Proterozoic aeon -- (from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms)
Overview of adj proterozoic
The adj proterozoic has 1 sense
- proterozoic -- (formed in the later of two divisions of the Precambrian era; "proterozoic life forms")