hydroxy-

1.
a combining form used in the names of chemical compounds in which the hydroxyl group is present:
hydroxyketone.
British Dictionary definitions for hydroxy-

hydroxy-

combining form
1.
(in chemical compounds) indicating the presence of one or more hydroxyl groups or ions
Word Origin
from hydro- + oxy(gen)
hydroxy- in Medicine

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