石炭紀 [－－纪]

Jyutping sek6 taan3 gei2
Pinyin shí tàn jì

Definitions (CC-CEDICT)
  1. Carboniferous (geological period 354-292m years ago)
Definitions (Wiktionary)
  1. name
    the Carboniferous period (part of the Paleozoic era, spanning from 358.9 to 298.9 million years ago)