Kneippism \Kneipp"ism\, n. Also Kneipp's \Kneipp's\, or Kneipp \Kneipp\, cure \cure\ Treatment of disease by forms of hydrotherapy, as walking barefoot in the morning dew, baths, wet compresses, cold affusions, etc.; -- so called from its originator, Sebastian Kneipp (1821-97), a German priest.

Source: Webster's Revised Unabridged Dictionary (1913)