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[hahy-drok-suh l] /haɪˈdrɒk səl/

containing the .
(modifier) of, consisting of, or containing the monovalent group -OH or the ion OH–: a hydroxyl group or radical

hydroxyl hy·drox·yl (hī-drŏk’sĭl)
The univalent radical or group OH, a characteristic component of bases, certain acids, phenols, alcohols, carboxylic and sulfonic acids, and amphoteric compounds.
The group OH. Hydroxyl is present in bases, certain acids, hydroxides, and alcohols.


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  • Hydroxylamine

    [hahy-drok-suh-luh-meen, -suh l-am-in] /haɪˌdrɒk sə ləˈmin, -səlˈæm ɪn/ noun 1. an unstable, weakly basic, crystalline compound, NH 3 O, used as a reducing agent, analytical reagent, and chemical intermediate. /haɪˌdrɒksɪləˈmiːn; -ˈæmɪn; -ˈsaɪləˌmiːn/ noun 1. a colourless crystalline compound that explodes when heated: a reducing agent. Formula: NH2OH

  • Hydroxylase

    [hahy-drok-suh-leys, -leyz] /haɪˈdrɒk səˌleɪs, -ˌleɪz/ noun, Biochemistry. 1. any enzyme that catalyzes the introduction of a into a substance. hydroxylase hy·drox·yl·ase (hī-drŏk’sə-lās’, -lāz’) n. Any of various enzymes that catalyze the formation of hydroxyl groups by oxidation of the substrate.

  • Hydroxylate

    [hahy-drok-suh-leyt] /haɪˈdrɒk səˌleɪt/ verb (used with object), hydroxylated, hydroxylating. 1. to introduce hydroxyl into (a compound).

  • Hydroxyl-group

    noun 1. the univalent group –OH, as in inorganic compounds, such as sodium hydroxide, NaOH, or as in organic compounds, such as ethyl alcohol, C 2 H 6 O.

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