Inorganic Chemical
hydroxyl radical
hy·drox·yl rad·i·cal [ hahy-drok-suhl rad-i-kuhl ]
Subclass of:
Reactive Oxygen Species; Hydroxides
Definitions related to hydroxyl radical:
  • A monovalent radical consisting of one hydrogen and oxygen atom found in bases, carboxylic acids, and alcohols.
    NCI
    U.S. National Cancer Institute, 2021
  • OH., a neutral, highly reactive, toxic free radical commonly found in biological systems.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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