Definition of hydroxyl in English:


Line breaks: hy|droxyl
Pronunciation: /hʌɪˈdrɒksʌɪl
, -sɪl


[as modifier] Chemistry
  • Of or denoting the radical —OH, present in alcohols and many other organic compounds: a hydroxyl group
    More example sentences
    • Phenols are a subgroup of alcohol in which the hydroxyl groups are attached directly to the carbon atoms of a ring structure.
    • The carbonyl group can be broken down by the action of hydrogen cyanide; a hydroxyl group and a nitrile group are formed in this reaction.
    • In the atmosphere the hydroxyl radicals oxidise nitrates to form ozone.


mid 19th century: from a blend of hydrogen and oxygen, + -yl.

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