Dictionary.com
Thesaurus.com

nitrosylsulfuric

American  
[nahy-truh-sil-suhl-fyoor-ik] / ˌnaɪ trə sɪl sʌlˈfyʊər ɪk /
Or nitrosylsulphuric

adjective

Chemistry.
  1. of or derived from nitrosylsulfuric acid.


Etymology

Origin of nitrosylsulfuric

First recorded in 1830–40; nitrosyl + sulfuric