资料来源 : pyDict

五氧化物

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Pentoxide \Pen*tox"ide\, n. [Penta- + oxide.] (Chem.)
   An oxide containing five atoms of oxygen in each molecule;
   as, phosphorus pentoxide, {P2O5}.

资料来源 : WordNet®

pentoxide
     n : an oxide containing five atoms of oxygen in the molecule