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  1. trigonal

    • IPA[ˈtrɪɡ(ə)n(ə)l]

    英式

    • adj.
      triangular;triangular in cross section
    • 釋義

    形容詞

    • 1. triangular square or trigonal double-sided inserts
    • triangular in cross section large trigonal shells
    • of or denoting a crystal system or three-dimensional geometrical arrangement having three equal axes separated by equal angles that are not right angles.
    • 更多解釋
    • IPA[ˈtriɡənl]

    美式

    • adj.
      triangular: square or trigonal double-sided inserts

    Oxford American Dictionary