Akademik

Epsom salts
n. a preparation of magnesium sulphate used as a purgative etc.
Etymology: Epsom in Surrey, where it was first found occurring naturally

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Epsom salts f19 [ˌepsəm ˈsɔːlts] [ˌepsəm ˈsɔːlts] noun plural
a white powder that can be mixed with water and used as a medicine or ↑laxative
 
Word Origin:
[Epsom salts] mid 18th cent.: named after the town of Epsom, in Surrey, SE England, where it was first found occurring naturally.

Useful english dictionary. 2012.