decadence.

In a decadal manner / With respect to decades

plural of decadence

plural of decadent

plural of decad

Archaic form of decade (“period of ten years”). / Archaic form of decade (“group of ten”). / (music) A group of ten notes from which the consonant triads may be constructed

Of or related to the number ten. / Of or related to a decade, in its various senses.

Characterized by moral or cultural decline. / Luxuriously self-indulgent.

A period of ten years , particularly such a period beginning with a year ending in 0 and ending with a year ending in 9.

A person affected by moral decay.