Dictionary.net

• A believer in the theory of degeneration, or hereditary degradation of type; as, the degenerationists hold that savagery is the result of degeneration from a superior state.

2010 - New Age Dictionary Database
By Oddity Software

• A believer in the theory of degeneration, or hereditary degradation of type; as, the degenerationists hold that savagery is the result of degeneration from a superior state.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.