奥陶纪

奥陶纪
Àotáojì

Ordovician (geological period 495-440m years ago)

1 meaning
MEANING

MEANING

  1. 壹名noun

    Ordovician (geological period 495-440m years ago)

    • 。

      The Ordovician Period is the second epoch of the Paleozoic Era.

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