light hydrogen

noun

Synonym of protium (“"the usual isotope of hydrogen"”).

Similar
protium
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Meanings

nounlight hydrogen (uncountable)
  1. uncountableSynonym of protium (“"the usual isotope of hydrogen"”).

    Synonyms: protium

Synonyms & antonyms

nounSynonym of protium (“"the usual isotope of hydrogen"”).

Similar
protium
Also see
protium

Origin

So named because it is the isotope of hydrogen with the lightest atomic weight and atomic mass, having one nucleon (a single proton and no neutrons).

Full word history & related roots →
Cite this entry
APA

light hydrogen. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/light%20hydrogen

MLA

“light hydrogen.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/light%20hydrogen. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “light hydrogen,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/light%20hydrogen.

Source: light hydrogen on Wiktionary, CC BY-SA 4.0.