Of or relating to aesthetics; relating to the philosophy or theory of beauty.
N.E.D. (1884) notes: ‘Often interchanged in use with aesthetic, but properly distinct; thus my aesthetical notions are the notions I have on the subject of aesthetics; my aesthetic faculties are those which exercise aesthetics.’..
Origin
Late 18th century. From ancient Greek αἰσθητικόςaesthetic + -al, after German ästhetischaesthetic.