| Often, Epsom salts. Chemistry, Pharmacology. hydrated magnesium sulfate, MgSO4·7H2O, occurring as small colorless crystals: used in fertilizers, the dyeing of fabrics, leather tanning, etc., and in medicine chiefly as a cathartic. |
| Epsom salts pl.n. (used with a sing. verb) Hydrated magnesium sulfate, MgSO4·7H2O, used as a cathartic and as an agent to reduce inflammation. [After Epsom, former name of Epsom and Ewell, England.] |
Epsom salts Ep·som salts (ěp'səm)
pl.n.
Hydrated magnesium sulfate, used as a cathartic and as an agent to reduce inflammation.