WordReference Random House Unabridged Dictionary of American English © 2026
Ep′som salt′, 
  1. Chemistry, DrugsOften, Epsom salts. 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.
  • 1760–70; after Epsom; so called from its presence in the local mineral water

'Epsom salt' also found in these entries (note: many are not synonyms or translations):
epsomite - magnesium sulfate

Forum discussions with the word(s) "Epsom salt" in the title:


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