oxyanionn.
/ˌɒksɪˈanʌɪən/, U.S. /ˌɑksiˈænˌaɪən/ Chemistry.
An anion containing one or more oxygen atoms bonded to another element (as in the sulphate and carbonate ions).
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oxyanion1907
1907 Jrnl. Soc. Chem. Industry 31 Aug. 902/1 All the solutions enumerated above that passivify iron contain an oxy-anion.
1940 Jrnl. Chem. Soc. 131 (heading) The interchange of heavy oxygen between water and inorganic oxy-anions.
1972 W. R. Kneen et al. Chem. xvii. 427 The phosphorus acids and oxyanions all contain approximately tetrahedral four-co-ordinate phosphorus.
1987 Nature 6 Aug. 498/2 The likely regions where charge will be generated in the transition state are..on the carbonyl oxygen of the substrate as it is partly an oxyanion in the transition state, [etc.].
This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022).
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n.1907