Hydroxy can refer to:
* In chemical nomenclature, the prefix "hydroxy-" shows the presence of a
hydroxyl
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula and composed of one oxygen atom covalently bonded to one hydrogen atom. In organic chemistry, alcohols and carboxylic acids contain one or more hydroxy ...
functional group (−OH).
* An abbreviation for the medication
hydroxyzine, which is commonly sold under the brand names Atarax, Ucerax, Serecid, and Vistaril.
* Hydroxy gas, a nickname for
oxyhydrogen, a combination of hydrogen and oxygen gas produced from the electrolysis of water.
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