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GEOLOGICAL ERA
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I. (noun)
Sense 1
Meaning:
A major division of geological time; an era is usually divided into two or more periods
Synonyms:
era; geological era
Classified under:
Nouns denoting time and temporal relations
Hypernyms ("geological era" is a kind of...):
geologic time; geological time (the time of the physical formation and development of the earth (especially prior to human history))
Meronyms (parts of "geological era"):
geological period; period (a unit of geological time during which a system of rocks formed)
Instance hyponyms:
Age of Mammals; Cenozoic; Cenozoic era (approximately the last 63 million years)
Age of Reptiles; Mesozoic; Mesozoic era (from 230 million to 63 million years ago)
Paleozoic; Paleozoic era (from 544 million to about 230 million years ago)
Holonyms ("geological era" is a part of...):
