Dictionary
Ep'som salt"
Often,
Epsom salts. Chem., Pharm.hydrated magnesium sulfate, MgSO
4·7H
2O, occurring as small colorless crystals: used in fertilizers, the dyeing of fabrics, leather tanning, etc., and in medicine chiefly as a cathartic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.