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nitrosulphureous

nitrosulˈphureous, a. Obs.
  [nitro- d.]
  Of the nature of nitre and sulphur.

1671 R. Bohun Wind 31 Especially the nitrosulphureous and other Minerall or Metallic Concretes. 1695 S. Patrick Comm. Gen. (1697) 318 Some of that dreadful Shower..falling upon her, wrapt her Body in a sheet of Nitro-Sulphureous Matter. 1708 Brit. Apollo No. 21. 2/1 Lightning [is] nothing else but a very subtle Nitro-sulphureous Matter enflamed.

Oxford English Dictionary

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