Dictionary Home »
Dictionary Definitions » Proterozoic
Proterozoic
adjective
designating or of the geologic eon characterized by the development of sedimentary rock, shallow seas, and the first soft-bodied, marine invertebrates; Precambrian, esp. late Precambrian
See Proterozoic in American Heritage Dictionary 4
Learn more about Proterozoic
link/cite print suggestion box