JMdict: 1703160

石炭紀 【せきたんき】

  1. [n,adj-no] the Carboniferous Period
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
Stone セキ, シャク, コク いし 1
Charcoal, Coal タン すみ 3
Chronicle, Account, Narrative, History, Annals, Geologic Period 4