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Definition 2024

奧陶紀

奧陶紀

See also: 奥陶纪

Chinese

		the Ordovician	discipline; age; era discipline; age; era; period; order; record
trad. (奧陶紀)		奧陶	紀
simp. (奥陶纪)		奥陶	纪

Proper noun

奧陶紀

the Ordovician period

See also

寒武紀／寒武纪 (Hánwǔjì)
志留紀／志留纪 (Zhìliújì)
古生代 (Gǔshēngdài)