奧陶紀

See also: 奥陶纪

Chinese

the Ordovician period
trad. (奧陶紀) 奧陶
simp. (奥陶纪) 奥陶

Pronunciation


Proper noun

奧陶紀

  1. (geology) the Ordovician period (part of the Paleozoic era, spanning from 485.4 to 443.4 million years ago)

See also

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