douche

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A stream of water, often containing medicinal or cleansing agents, that is applied to a body part or cavity for hygienic or therapeutic purposes.
• noun A stream of air applied in a similar way.
• noun The application of a douche.
• noun An instrument for applying a douche.
• noun Vulgar Slang A foolish or contemptible person.
• intransitive verb To cleanse or treat by means of a douche.
• intransitive verb To cleanse or treat oneself with a douche.

from The Century Dictionary.

• noun A jet or current of water or vapor applied to some part or a particular organ of the body, as in a bath or for medicinal purposes.
• noun An instrument for administering such a jet.
• To apply a douche to.

from the GNU version of the Collaborative International Dictionary of English.

• noun A jet or current of water or vapor directed upon some part of the body to benefit it medicinally; a douche bath.
• noun (Med.) A syringe.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A jet or current of water or vapour directed upon some part of the body to benefit it medicinally (especially in reference to vaginal irrigation.)
• noun Something that produces the jet or current in the previous sense.
• noun A syringe used for that process.
• noun pejorative A douche bag.
• verb To use a douche.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun 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
• verb direct a spray of water into a bodily cavity, for cleaning
• noun a small syringe with detachable nozzles; used for vaginal lavage and enemas