An enema; a syringe-like medical instrument used to inject liquid into the body for cleansing or medicinal purposes, or the liquid preparation itself.
From Greek klystron or klyzein (to rinse), entering English through French clystère. The word became common in English medical and household practice, especially during the 17th-19th centuries.
Clysters were so popular in 18th-century Europe that they became almost fashionable—wealthy people had ornate clyster sets like we'd have bathroom accessories today, and doctors prescribed them for nearly everything from headaches to bad moods.
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