The Collaborative International Dictionary of English v.0.48:

Sybarite \Syb"a*rite\, n. [L. Sybarita, Gr. ?, fr. ?, a city in
   Italy, noted for the effeminacy and voluptuousness of its
   inhabitants; cf. F. Sybarite.]
   A person devoted to luxury and pleasure; a voluptuary.
   [1913 Webster] Sybaritic

WordNet (r) 3.0 (2006):

sybarite
    n 1: a person addicted to luxury and pleasures of the senses
         [syn: voluptuary, sybarite]