Epsom salts

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Epsom salts Magnesium sulphate, originally found in a mineral spring in Epsom, Surrey, England; acts as a purgative because the osmotic pressure of the solution causes it to retain water in the intestine and so increase the bulk and moisture content of the faeces.

Epsom salts

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Ep·som salts • pl. n. crystals of hydrated magnesium sulfate, MgSO4.7H2O, used as a purgative or for other medicinal use.

Epsom salts

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Epsom salts See EPSOMITE.