dec·a·dent 
(dĕkə-dənt, dĭ-kādnt)
(dĕkə-dənt, dĭ-kādnt)adj.
1. Being in a state of decline or decay.
2. Marked by or providing unrestrained gratification; self-indulgent.
3. often Decadent Of or relating to literary Decadence.
n.
1. A person in a condition or process of mental or moral decay.
2. often Decadent A member of the Decadence movement.
[French décadent, back-formation from décadence, decadence; see DECADENCE.]
deca·dent·ly adv.