epsom salts

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Noun epsom salts has 2 senses

Epsom salts, bitter salts - hydrated magnesium sulfate that is taken orally to treat heartburn and constipation and injected to prevent seizures
--₁ is a kind of magnesium sulfate
Epsom salts - hydrated magnesium sulfate used as a laxative
--₂ is a kind of purgative, cathartic, physic, aperient