| / English Dictionary |
PROTEROZOIC
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
From 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
Synonyms:
Proterozoic; Proterozoic aeon; Proterozoic eon
Classified under:
Nouns denoting time and temporal relations
Instance hypernyms:
aeon; eon (the longest division of geological time)
Holonyms ("Proterozoic" 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)
Derivation:
proterozoic (formed in the later of two divisions of the Precambrian era)
II. (adjective)
Sense 1
Meaning:
Formed in the later of two divisions of the Precambrian era
Example:
proterozoic life forms
Classified under:
Similar:
early (at or near the beginning of a period of time or course of events or before the usual or expected time)
Domain category:
geology (a science that deals with the history of the earth as recorded in rocks)
Derivation:
Proterozoic (from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms)
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