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Definitions

peroxide

[puh-rok-sahyd] / pəˈrɒk saɪd /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The researchers found that the crystals, made from an iron-containing compound called heme, are set in motion by the breakdown of hydrogen peroxide into water and oxygen.

From Science Daily • Mar. 19, 2026

Compared with normal tissue, cancer cells tend to be more acidic and contain higher levels of hydrogen peroxide.

From Science Daily • Mar. 1, 2026

When E. faecalis is present in a wound, the hydrogen peroxide it produces causes oxidative stress in nearby human skin cells.

From Science Daily • Jan. 20, 2026

When the researchers treated stressed skin cells with catalase, a naturally occurring antioxidant enzyme that breaks down hydrogen peroxide, cellular stress levels dropped.

From Science Daily • Jan. 20, 2026

She rummaged through, handing Boaz antibacterial wipes, a tiny bottle of peroxide, Band-Aids, and a few packets of ibuprofen that had an expiration date of two years prior.

From "Night Owls" by A.R. Vishny