古生代 [ㄍㄨˇ ㄕㄥ ㄉㄞˋ; gu3 sheng1 dai4]
Paleozoic, geological era 545-250m years ago, covering Cambrian 寒武紀, Ordovician 奧陶紀, Silurian 志留紀, Devonian 泥盆紀, Carboniferous 石炭紀, Permian 二疊紀
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古生代
こせいだい
noun (common) (futsuumeishi)
nouns which may take the genitive case particle `no'
Paleozoic era
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