Tritium

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Tritium n (strong, genitive Tritiums, no plural)

1. tritium (hydrogen isotope, chemical symbol: T)

• “Tritium” in Duden online

From a Hispano-Celtic language, from Proto-Celtic *tritiyos (“third”).

• (Classical Latin) IPA^(key): /ˈtri.ti.um/, [ˈt̪rɪt̪iʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈtrit.t͡si.um/, [ˈt̪rit̪ː͡s̪ium]

Tritium n sg (genitive Tritiī or Tritī); second declension

1. A town of the Autrigones in Hispania Tarraconensis

Second-declension noun (neuter), with locative, singular only.

¹Found in older Latin (until the Augustan Age).

• Tritium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• “Tritium”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly