oxyl

plural oxyls

1. chemistryA compound or radical bound to an oxygen by a single bond

   If a Type I- or Type II-derived LOOH encounters a ligated Fe2+ or Cu+ on a membrane, it invariably undergoes one-electron reduction to an oxyl radical (LO-) […]

   2007, Albert W. Girotti, Paolo U. Giacomoni, “Lipid and Protein Damage Provoked by Ultraviolet Radiation: Mechanisms of Indirect Photooxidative Damage”, in Giacomoni, editor, Biophysical and Physiological Effects of Solar Radiation on Human Skin, →ISBN, page 271

2. obsoletechemistryAn acid anhydride

   The formula (CaO, CO2) would represent calcic carbonate as a compound of a base and an oxyl.

   1865, W.A. Miller, “On Chemical Nomenclature”, in The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, page 18