hydrogen

English

Chemical element
H Next: helium (He)

Etymology

From French hydrogène, coined by Louis-Bernard Guyton de Morveau, from Ancient Greek ὕδωρ (húdōr, water) + γεννάω (gennáō, I bring forth). Corresponding to hydro- + -gen.

Pronunciation

  • (Received Pronunciation) IPA(key): /ˈhaɪdɹədʒ(ə)n/
  • (General American) enPR: hī'drəjən, IPA(key): /ˈhaɪdɹəd͡ʒən/, [ˈhaɪd͡ʒɹəd͡ʒən]
  • (file)
  • Hyphenation: hy‧dro‧gen

Noun

hydrogen (countable and uncountable, plural hydrogens)

  1. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.
    • For quotations using this term, see Citations:hydrogen.
    1. An atom of the element.
  2. Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.
    1. A molecule of this molecular species
  3. A sample of the element/molecule.

Synonyms

element
  • element 1
molecule

Hyponyms

isotopes
molecule
  • deuterium deuteride
  • deuterium hydride
  • deuterium protide
  • deuterium tritide
  • dihydrogen
  • hydrogen deuteride
  • hydrogen hydride
  • hydrogen protide
  • hydrogen tritide
  • orthohydrogen
  • parahydrogen
  • protium deuteride
  • protium hydride
  • protium protide
  • protium tritide
  • tritium deuteride
  • tritium hydride
  • tritium protide
  • tritium tritride

Derived terms

Descendants

  • Burmese: ဟိုက်ဒရိုဂျင် (huikda.ruigyang)

Translations

References

Further reading

Danish

Noun

hydrogen n (singular definite hydrogenet, not used in plural form)

  1. hydrogen
    Synonym: brint

Norwegian Bokmål

Chemical element
H Next: helium (He)

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

  1. hydrogen (chemical element, symbol H)

Derived terms

Norwegian Nynorsk

Chemical element
H Next: helium (He)

Noun

hydrogen n (definite singular hydrogenet) (uncountable)

  1. hydrogen (chemical element, symbol H)

Derived terms

Welsh

Chemical element
H Next: heliwm (He)

Etymology

Borrowed from English hydrogen, from French hydrogène, from Ancient Greek ὕδωρ (húdōr, water) + γεννάω (gennáō, I bring forth).

Pronunciation

  • (North Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɨ̞drɔˌɡɛn/
  • (South Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɪdrɔˌɡɛn/
  • Rhymes: -ədrɔɡɛn, -ɨ̞drɔɡɛn

Noun

hydrogen m (uncountable, not mutable)

  1. hydrogen
    Synonyms: ulai, ulnwy

Derived terms

  • adnewyddu hydrogen (hydrogen renewability)
  • alcyleiddio hydrogen fflworid (hydrogen fluoride alkylation)
  • bond hydrogen (hydrogen bond)
  • derbynnydd hydrogen (hydrogen acceptor)
  • halid hydrogen (hydrogen halide)
  • hydrogen bromid (hydrogen bromide)
  • hydrogen clorid (hydrogen chloride)
  • hydrogen fflworid (hydrogen fluoride)
  • hydrogen ïodid (hydrogen iodide)
  • hydrogen perocsid (hydrogen peroxide)
  • hydrogen sylffid (hydrogen sulphide)
  • hydrogenaidd (hydrogenous)
  • hydrogeneiddio (hydrogenise, hydrogenate)
  • ïon hydrogen (hydrogen ion)

Further reading

  • R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), hydrogen”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies
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