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Definition of Sal ammoniac
1. Noun. A white salt used in dry cells. 
Definition of Sal ammoniac
1. Noun. (mineral) a rare mineral composed of ammonium chloride found around volcanic fumaroles and guano deposits. ¹
2. Noun. (chemistry archaic) ammonium chloride. ¹
¹ Source: wiktionary.com
Medical Definition of Sal ammoniac
1. 



