As an adjective hydroxy
is (chemistry) being, or containing a hydroxyl radical.
As a noun hexanoyl is
(organic chemistry|especially in combination) the univalent radical derived from hexanoic acid by loss of the hydroxy group; caproyl.
hydroxy
English
Adjective
(-)
(chemistry) Being, or containing a hydroxyl radical.
* Note : used as a prefix, hydroxy-, in the names of very many organic compounds
hexanoyl
English
Noun
(
en noun)
(organic chemistry, especially in combination) The univalent radical derived from hexanoic acid by loss of the hydroxy group; caproyl