Webster's Revised Unabridged Dictionary · 1913

Decadent

Decadent , adjective

Decaying; deteriorating.

Decadent , noun

One that is decadent, or deteriorating; esp., one characterized by, or exhibiting, the qualities of those who are degenerating to a lower type; -- specif. applied to a certain school of modern French writers.
The decadents and asthetes, and certain types of realists. — C. L. Dana
The business men of a great State allow their State to be represented in Congress by “decadents”. — The Century