Yahoo奇摩字典 網頁搜尋

搜尋結果

  1. alumina

    • IPA[əˈl(j)uːmɪnə]

    英式

    • n.
      a white solid that is a major constituent of many rocks, especially clays, and is found crystallized as corundum, sapphire, and other minerals.
    • noun: alumina