tritiated Syllabification: (tri·ti·at·ed)Pronunciation: /ˈtritēˌātid, ˈtriSH-/Definition of tritiated adjective Chemistry (of a compound) in which the ordinary isotope of hydrogen has been replaced with tritium. Derivatives tritiationPronunciation: /ˌtriSHēˈāSHən/ noun tritiated in other Oxford dictionaries Definition of tritiated in the British & World English dictionary