'Epsom salt' definitions:
Definition of 'Epsom salt'
From: GCIDE
- Epsom salts \Ep"som salts`\ or Epsom salt \Ep"som salt`\ (Med.) 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. [1913 Webster]