n. The therapeutic use of water, either internal or external
the GNU version of the Collaborative International Dictionary of English
n. The water cure; a mode of treating diseases by the copious and frequent use of pure water, both internally and externally.
The Century Dictionary and Cyclopedia
n. The method of treating diseases by the external and internal use of water; hydrotherapeutics, especially in the cruder forms. See water-cure.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the internal and external use of water in the treatment of disease
Word Usage
"Meanwhile, the average townfolk turned to fixing themselves as well, trying everything from religion to vegetarianism to hydropathy—the last of which required cold water immersions, foot baths, douches, and the like."