regimen

Short definition from Wiktionary

Noun

1. 1
   Orderly government; system of order; administration.
2. 2
   Any regulation or remedy which is intended to produce beneficial effects by gradual operation.
3. 3
   Object.
4. 4
   A syntactical relation between words, as when one depends on another and is regulated by it in respect to case or mood; government.
5. 5
   Diet; limitations on the food that one eats, for health reasons.