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a combining form used in the names of chemical compounds in which the hydroxyl group is present:
[hahy-drok-suh l] /haɪˈdrɒk səl/
containing the .
(of a chemical compound) containing one or more hydroxyl groups
combining form
(in chemical compounds) indicating the presence of one or more hydroxyl groups or ions
(modifier) of, consisting of, or containing the monovalent group -OH or the ion OH–: a hydroxyl group or radical

hydroxy- pref.
Having, adding, or substituting a hydroxyl radical in a compound: hydroxyapatite.

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.
Containing the hydroxyl group (OH).
The group OH. Hydroxyl is present in bases, certain acids, hydroxides, and alcohols.


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  • Hydroxyacetic-acid

    [hahy-drok-see-uh-see-tik, -uh-set-ik, -drok-] /haɪˈdrɒk si əˈsi tɪk, -əˈsɛt ɪk, -ˌdrɒk-/ noun 1. .

  • Hydroxy-acid

    noun 1. an organic acid containing both a carboxyl and a hydroxyl group. 2. any of a class of organic acids containing a hydroxyl group and showing properties of both an alcohol and an acid. noun 1. any acid, such as sulphuric acid, containing hydroxyl groups in its molecules 2. any of a class of […]

  • Hydroxyapatite

    [hahy-drok-see-ap-uh-tahyt] /haɪˌdrɒk siˈæp əˌtaɪt/ noun 1. a mineral, Ca 10 (PO 4) 6 OH 2 , that is the principal storage form of calcium and phosphorus in bone. hydroxyapatite hy·drox·y·ap·a·tite (hī-drŏk’sē-āp’ə-tīt’) n. The principal bone salt that provides the compressional strength of vertebrate bone.

  • Hydroxybenzene

    [hahy-drok-si-ben-zeen, -ben-zeen] /haɪˌdrɒk sɪˈbɛn zin, -bɛnˈzin/ noun 1. (def 1).

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