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  1. icosahedron

    • IPA[ˌʌɪkɒsəˈhiːdrən]

    英式

    • n.
      a solid figure with twenty plane faces, especially equilateral triangular ones.
    • noun: icosahedron, plural noun: icosahedra

    • 更多解釋
    • IPA[īˌkōsəˈhēdrən]

    美式

    • n.
      a solid figure with twenty plane faces, especially equilateral triangular ones.

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  2. 知識+

    • 英文數字字首(prefixes)

      ...hendeca". Prefixes above 12 are not commonly used, except 20 in icosahedron, 100 in hectare, and 1000 in the metric system. 沒找到14,16,18,22...我再找找再補充...