protium Syllabification: (pro·ti·um)Pronunciation: /ˈprōtēəm, ˈprōSH(ē)əm/Definition of protium noun Chemistry the common, stable isotope of hydrogen, as distinct from deuterium and tritium. Origin: 1930s: modern Latin, from Greek prōtos 'first'protium in other Oxford dictionaries Definition of protium in the British & World English dictionary
