Epsom salts

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(functioning as singular or plural) a medicinal preparation of hydrated magnesium sulphate, used as a purgative
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Word Origin for Epsom salts

C18: named after Epsom, where they occur naturally in the water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Medical definitions for Epsom salts

Epsom salts
[ ĕpsəm ]

Hydrated magnesium sulfate, used as a cathartic and as an agent to reduce inflammation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for Epsom salts

Epsom salts
[ ĕpsəm ]

A bitter, colorless, crystalline salt, used in making textiles, in fertilizers, for medical purposes, and as an additive to bath water to soothe the skin. Chemical formula: MgSO4·7H2O.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.