selenonium
Sel`e*no"ni*um, n. Etym: [Selenium + sulphonium.] (Chem.) Defn: A hypothetical radical of selenium, analogous to sulphonium.
Sel`e*no"ni*um, n. Etym: [Selenium + sulphonium.] (Chem.) Defn: A hypothetical radical of selenium, analogous to sulphonium.