peroxide

plural peroxides

1. countableuncountablechemistryA divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group yields hydrogen peroxide when treated with an acid.
2. countableuncountableHydrogen peroxide, especially when in an aqueous solution used as a bleach.
3. countableuncountablechemistryAny compound containing the functional group R-O-O-R'.

   The O–O bond in benzoyl peroxide and the C–N bonds in AIBN homolyze under thermal or photochemical conditions.

   2007, Robert B. Grossman, The Art of Writing Reasonable Organic Reaction Mechanisms, →ISBN

   1 more example

   Thus far, Dr. Petrakis said, he had found that in women with […] extractable breast fluid, the amount of lipid peroxides in the fluid was on the average seven times higher in Caucasian women than in women of Chinese de[s]cent. In addition, women with cystic breast disease, who face a higher than usual risk of breast cancer, appear to have more peroxides in their breast fluid than women with normal breasts.

   1975 March 23, Jane Brody, “Clue to Cancer Found in Breast Fluid”, in The New York Times

present singular third person peroxides · participle present peroxiding · participle past peroxided · past peroxided

1. transitiveTo treat (something) with hydrogen peroxide, especially hair in order to bleach it.