Hydrogen-1

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Synonym of protium (“most common isotope of hydrogen”). uncountable

Synonyms

All synonyms
protium

Etymology

So named because it is the isotope of hydrogen that has one nucleon (a single proton and no neutrons).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.