| oxides | <chemistry> Binary compounds of oxygen containing the anion o(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides. (12 Dec 1998) |
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| heterocyclic oxides | Oxides of a ring compound having atoms other than carbon in its ring. (12 Dec 1998) |
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| nitrogen oxides | Inorganic oxides that contain nitrogen. (12 Dec 1998) |
| sulfur oxides | Inorganic oxides of sulfur. (12 Dec 1998) |