Roussin's salt

noun Rous·sin's salt \ˈrüsə̇nz-\

Definition of Roussin's salt

  1. :  any of two series of alkali metal salts that are nitrosyl and sulfur complexes of iron: a :  a red unstable salt having the general formula M[Fe(NO)2S] and obtainable by reaction of nitric oxide with ferrous sulfide b :  a black more stable salt having the general formula M[Fe4(NO)7S3] and obtainable (as by treatment with alkali) from a red salt

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Origin and Etymology of roussin's salt

after François-Zacharie Roussin †1894 French chemist


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capable of being understood in two ways

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