Emily Dickinson Lexicon

AES-THET'ICS, or ES-THET'ICS, n. [ÆS-THET'ICS; Gr. αισθητικος.]

In the fine arts, that science which derives the first principles in all arts from the effect which certain combinations have on the mind, as connected with nature and right reason. It is intimately related to sentiment. – Brande.