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Synonyms & antonyms
nounSynonym of tritium (“isotope of hydrogen”).
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Origin
So named because it is the isotope of hydrogen that has three nucleons (a proton and two neutrons).
Full word history & related roots →Cite this entry
APA
hydrogen-3. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/hydrogen-3
MLA
“hydrogen-3.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hydrogen-3. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “hydrogen-3,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/hydrogen-3.
Source: hydrogen-3 on Wiktionary, CC BY-SA 4.0.