ಅರ್ಥ : From 2,500 to 544 million years ago. Bacteria and fungi. Primitive multicellular organisms.
ಸಮಾನಾರ್ಥಕ : proterozoic aeon, proterozoic eon
ಅರ್ಥ : Formed in the later of two divisions of the Precambrian era.
ಉದಾಹರಣೆ :
Proterozoic life forms.