石炭紀 [ㄕˊ ㄊㄢˋ ㄐㄧˋ; shi2 tan4 ji4] Carboniferous (geological period 354-292m years ago) ◄ ►
石炭紀 せきたんき noun (common) (futsuumeishi) nouns which may take the genitive case particle `no' the Carboniferous Period ◄ ►