degeneracy

中文： 堕落、退化、简并

1. The state of being degenerate (in all senses). (countable, uncountable)
2. The ability of one part of the brain to take over another's function without being overexerted. (countable, uncountable)
3. A limiting case of a class of objects which appears to be qualitatively different from (and usually simpler than) the rest of the class. (countable, uncountable)

复数 degeneracies