Relating to aesthetics or the appreciation of beauty; concerned with art, beauty, and artistic taste.
From aesthetic + -al (adjectival suffix). An older or more formal variant of 'aesthetic,' sometimes used in philosophical or academic contexts.
Calling something 'aesthetical' instead of 'aesthetic' sounds more formal and philosophical, which is why you'll find it in 18th and 19th-century writings about art and beauty—it's like English speakers were still deciding which form sounded more authoritative.
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