D defs.my
Entry 1 sense Webster, 1913

Epsom salts

/ĕp'-səm sôlts/ · Ep·som salts · IPA
01 Sulphate of magnesia having cathartic qualities; -- originally prepared by boiling down the mineral waters at Epsom, England, -- whence the…
  1. 1.
    Sulphate of magnesia having cathartic qualities; -- originally prepared by boiling down the mineral waters at Epsom, England, -- whence the name; afterwards prepared from sea water; but now from certain minerals, as from siliceous hydrate of magnesia.(Med.)