proterozoic

Noun
  1. From 2,500 to 544 million years ago;
    Bacteria and fungi;
    Primitive multicellular organisms (synset 115153949)
    is an instance of: aeon, eon - the longest division of geological time
    is a part of: precambrian, precambrian aeon, precambrian eon, precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
    same as: proterozoic aeon, proterozoic eon
Adjective
  1. Formed in the later of two divisions of the Precambrian era (synset 300818975)
    "proterozoic life forms"
    referred to in: geology - a science that deals with the history of the earth as recorded in rocks
    similar to: early - at or near the beginning of a period of time or course of events or before the usual or expected time

Other Searches