Proterozoic


Pro·te·ro·zo·ic

adjective \ˌprä-tə-rə-ˈzō-ik, ˌprō-\

Definition of PROTEROZOIC

:  of, relating to, or being the eon of geologic time or the corresponding segment of rocks that includes the interval between the Archean and Phanerozoic eons, exceeds in length all of subsequent geologic time, and is marked by rocks that contain fossils indicating the first appearance of eukaryotic organisms (as algae) — see geologic time table
Proterozoic noun

Origin of PROTEROZOIC

Greek proteros former, earlier (from pro before) + International Scientific Vocabulary -zoic — more at for
First Known Use: 1899

Browse

Next Word in the Dictionary: protervity
Previous Word in the Dictionary: proterotype
All Words Near: Proterozoic

Seen & Heard

What made you want to look up Proterozoic? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More