diazonium

noun

di·​a·​zo·​ni·​um ˌdī-ə-ˈzō-nē-əm 

: the monovalent cation N₂⁺ that is composed of two nitrogen atoms united to carbon in an organic radical and that usually exists in salts used in the manufacture of azo dyes

Word History

Etymology

International Scientific Vocabulary di- + az- + -onium

First Known Use

1895, in the meaning defined above

Medical Definition

diazonium

noun

di·​a·​zo·​ni·​um ˌdī-ə-ˈzō-nē-əm 

: the monovalent cation N₂⁺ that is composed of two nitrogen atoms united to carbon in an organic radical and that usually exists in salts used in the manufacture of azo dyes