15248020-n 'a major division of geological time';
 
Chinese (simplified) 纪元 , 代
English era , geological era
Indonesian waktu geologi
Japanese 代
Definitions
Japanese
地質学的年代の主要な区分
通常時代は、2つ以上の期間に分割される
English
a major division of geological time
an era is usually divided into two or more periods
Relations
Hypernym: geological_time
Instance: paleozoic mesozoic cenozoic
Meronym–Part: period
Holonym–Part: eon
Semantic Field: timen
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Maintainer: Francis Bond <bond@ieee.org>