Hydrogenium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Hydrogen, especially when formerly considered as a metal. obsolete, uncountable

Synonyms

All synonyms
ammoniaatomic number 1carbon dioxidedihydrogene949e949

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