Library / 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:

Adjectives

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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