As an adjective hydroxy
is (chemistry) being, or containing a hydroxyl radical.
As a noun aldol is
(organic chemistry) any aldehyde or ketone having a hydroxy group in the beta- position.
Other Comparisons: What's the difference?
(chemistry) Being, or containing a hydroxyl radical.
* Note : used as a prefix, hydroxy-, in the names of very many organic compounds
(organic chemistry) Any aldehyde or ketone having a hydroxy group in the beta- position