Neoproterozoic

Origin

- + neo + Proterozoic

Full definition of Neoproterozoic

Adjective

1. (geology) Of a geologic era within the Proterozoic eon; comprises the Tonian, Cryogenian and Ediacaran periods from about 1000 to 544 million years ago, when algae and sponges flourished.

Proper noun

1. (geology) The Neoproterozoic era.

Further reading