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")