hydrogenium

== English == === Noun === hydrogenium (uncountable) (obsolete) Hydrogen, especially when formerly considered as a metal. == Latin == === Alternative forms === hydrogenum === Etymology === Learned borrowing from French hydrogène. === Pronunciation === (Classical Latin) IPA(key): [hy.drɔˈɡɛ.ni.ũː] (modern Italianate Ecclesiastical) IPA(key): [i.droˈd͡ʒɛː.ni.um] === Noun === hydrogenium n (genitive hydrogeniī); second declension (New Latin, chemistry) hydrogen ==== Declension ==== Second-declension noun (neuter). ==== Related terms ==== hydrologia