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1. Oxford American Dictionary

   pentoxide

   • IPA[penˈtäkˌsīd]

   美式

   • n.
     an oxide containing five atoms of oxygen in its molecule or empirical formula.

   • noun: pentoxide, plural noun: pentoxides

2. • 更多解釋

   pentoxide

   • IPA[pɛnˈtɒksʌɪd]

   英式

   • n.
     an oxide containing five atoms of oxygen in its molecule or empirical formula.

   Oxford Dictionary