degeneracy

noun

1. degenerate state or character.
2. the process of degenerating; decline.
3. degenerate behavior, especially behavior considered sexually deviant.
4. Physics. the number of distinct quantum states of a system that have a given energy.

noun plural -cies

1. the act or state of being degenerate
2. the process of becoming degenerate
3. physics the number of degenerate quantum states of a particular orbital, degree of freedom, energy level, etc