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Ordovician
/ˌɔːdəvˈɪʃən/
/ˌɔːɹdəvˈɪʃən/
Noun (1)
"ordovician" の定義と意味
Ordovician
名詞
01
オルドビス紀の
from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
Ordovician period
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