奥陶系

奥陶系
Àotáoxì

Ordovician system (geology)

1 meaning
MEANING

MEANING

  1. 壹名noun

    Ordovician system (geology)

    • 。

      The Ordovician is a period in geological time.

STROKE ORDER
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STRUCTURE
⿱(top-bottom)
⿵(surround above)
宀
米
大
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