Origin of peroxideper- + oxide
- The divalent O2 group, or a compound containing this group, such as sodium peroxide, Na2O2, used as an oxidizing agent or bleach.
- Hydrogen peroxide.
transitive verbper·ox·id·ed, per·ox·id·ing, per·ox·ides
- To treat with peroxide.
- To bleach (hair) with hydrogen peroxide.