nitro-sulphurous
/ˌnʌɪtrəʊˈsʌlf(ə)rəs/ /ˌnʌɪtrəʊˈsʌlfjʊrəs/(US nitro-sulfurous) Chemistry rare. Now historical
adjective
= nitrosulphureous.
Origin
Early 18th century; earliest use found in Edmond Halley (1656–1742), astronomer. From nitro- + sulphurous.