Source : Webster's Revised Unabridged Dictionary (1913)

Douche \Douche\, n. [F., fr. It. doccia, fr. docciare to flow,
   pour, fr. an assumed LL. ductiare, fr. L. ducere, ductum, to
   lead, conduct (water). See {Duct}.]
   1. A jet or current of water or vapor directed upon some part
      of the body to benefit it medicinally; a douche bath.

   2. (Med.) A syringe.

Source : WordNet®

douche
     n 1: a small syringe with detachable nozzles; used for vaginal
          lavage and enemas [syn: {douche bag}]
     2: irrigation with a jet of water or medicated solution into or
        around a body part (especially the vagina) to treat
        infections or cleanse from odorous contents
     v : direct a spray of water into a bodily cavity, for cleaning