carbonium

== English == === Etymology === From carb- +‎ -onium. === Noun === carbonium (plural carboniums) (dated, deprecated) Any of several organic cations; carbocation or carbenium. ==== Derived terms ==== carbonium ion ==== References ==== “carbonium”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000. “carbonium”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. == Latin == === Etymology === Derived from carbō, carbōnis (“charcoal, coal”) +‎ -ium (chemical element suffix). === Pronunciation === (Classical Latin) IPA(key): [karˈboː.ni.ũː] (modern Italianate Ecclesiastical) IPA(key): [karˈbɔː.ni.um] === Noun === carbōnium n (genitive carbōniī); second declension (New Latin) carbon ==== Declension ==== Second-declension noun (neuter). ==== Related terms ==== carbō carboneum ==== Descendants ==== → Catalan: carboni → Italian: carbonio