Hydroxyl definition

hī-drŏksĭl
The univalent group OH, a characteristic component of bases, certain acids, phenols, alcohols, carboxylic and sulfonic acids, and amphoteric compounds.
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The monovalent radical OH, present in all hydroxides.
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The group OH. Hydroxyl is present in bases, certain acids, hydroxides, and alcohols.
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A negative ion formed by the attachment of an oxygen (O) atom and a hydrogen (H) atom.
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In telecommunications, hydroxyl ions are a contaminant introduced into the single-mode optical fiber (SMF) during the manufacturing process.The hydroxyl ions cause water peak attenuation in several wavelength windows, rendering them unusable, which has considerable implications for high speed fiber optics transmission systems (FOTS) employing coarse wavelength division multiplexing (CWDM). See also attenuation, CWDM, FOTS, ion, SMF, water peak, wavelength, and window.
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(chemistry) A univalent radical or functional group (–OH) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds.
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Other Word Forms

Noun

Singular:
hydroxyl
Plural:
hydroxyls

Origin of hydroxyl

  • hydr(o)– ox(ygen) –yl

    From American Heritage Dictionary of the English Language, 5th Edition

Hydroxyl Sentence Examples

  • Substituting one hydroxyl group into each of these residues, we obtain radicals of the type - CH 2.

  • By the action of phosphorus pentachloride, the hydroxyl group is replaced by chlorine.

  • On the chromophoreauxochrome theory (the nitro group being the chromophore, and the hydroxyl the auxochrome) it is necessary in order to explain the high colour of the metallic salts and the colourless alkyl and aryl derivatives to assume that the auxochromic action of the hydroxyl group is only brought strongly into evidence by salt formation.

  • By the entrance of amino or hydroxyl groups into the molecule dyestuffs are formed.

  • When heated with concentrated hydrochloric acid the amino group is replaced by the hydroxyl group and the phenolic eurhodols are produced.

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Words near hydroxyl in the Dictionary