- Divalent anionic oxygen, or a compound of oxygen, especially a binary compound of oxygen with a more electropositive element.
- See <internalXref urlencoded="oxid">oxid</internalXref>.
- A binary compound of oxygen with an atom or radical, or a compound which is regarded as binary
- A <xref>binary</xref> <xref>chemical</xref> <xref>compound</xref> of <xref>oxygen</xref> with another chemical <xref>element</xref>.
- any compound of oxygen with another element or a radical