Xerophagy n. : Among the primitive Christians, the living on a diet of dry food in Lent and on other fasts.

Example:
Does the Navy still use Xerophagy as a form of punishment?

Taxonomy
Xerophagy, free encyclopedia, bread and water, punishment, Eastern Orthodox, Eastern Catholic, confinement, Uniform Code of Military Justice, United States Navy, search, instances, discipline, Lenten, vegetables, water and salt, fruit, nuts, honey.

Defination from the web:
xerophagy during Lent and other fasts. More recently, involuntary xerophagy is imposed on miscreants as punishment, adding to the misery of their confinement. ...