hydrogen

== English == === Etymology === Borrowed from French hydrogène (“hydrogen”), coined by the French chemists Louis-Bernard Guyton de Morveau (1737–1816) and Antoine Lavoisier (1743–1794) from hydro- (prefix meaning ‘water’) + -gène (suffix denoting a producer of something), from the fact that water is produced as a compound when hydrogen is oxidized. The prefix hydro- is borrowed from Ancient Greek ῠ̔δρο- (hŭdro-), from ῡ̆̔́δωρ (hū̆́dōr, “water”), ultimately from Proto-Indo-European *wed- (“water”). The suffix -gène is borrowed from Ancient Greek -γενής (-genḗs, suffix meaning ‘born in a certain condition or place’), from γένος (génos, “descendant, offspring; race; etc.”) (ultimately from Proto-Indo-European *ǵenh₁- (“to beget, produce; to give birth”)) + -ης (-ēs, suffix forming some third-declension adjectives). By surface analysis, hydro- (prefix meaning ‘water’) +‎ -gen (suffix denoting a producer of something). === Pronunciation === (Received Pronunciation) IPA(key): /ˈhaɪdɹəd͡ʒ(ə)n/ (General American) enPR: hī'drəjən, IPA(key): /ˈhaɪdɹəd͡ʒ(ə)n/, (sometimes) [ˈhaɪd͡ʒɹəd͡ʒən] Rhymes: -aɪdɹədʒən Hyphenation: hy‧dro‧gen === Noun === hydrogen (countable and uncountable, plural hydrogens) (chemistry) (uncountable) The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008. Alternative form: H (symbol) (countable) An atom of this element. (uncountable) Molecular hydrogen (sense 1; symbol H2), a colourless, odourless and flammable gas at room temperature. (countable) A molecule of this molecular species. (uncountable) Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, 1H, or 11H), as contrasted with deuterium and tritium”). ==== Synonyms ==== ==== Hyponyms ==== ==== Derived terms ==== ==== Related terms ==== ==== Descendants ==== → Burmese: ဟိုက်ဒရိုဂျင် (huikda.ruigyang) ==== Translations ==== ==== See also ==== === References === === Further reading === hydrogen on Wikipedia.Wikipedia “Hydrogen”, in Periodic Table‎[1], Royal Society of Chemistry, 2025, archived from the original on 16 August 2025 == Danish == === Etymology === From French hydrogène. === Noun === hydrogen n (singular definite hydrogenet, not used in plural form) hydrogen Synonym: brint ==== Declension ==== === References === “hydrogen” in Den Danske Ordbog == Norwegian Bokmål == === Noun === hydrogen n (definite singular hydrogenet) (uncountable) hydrogen (chemical element, symbol H) ==== Derived terms ==== == Norwegian Nynorsk == === Noun === hydrogen n (definite singular hydrogenet) (uncountable) hydrogen (chemical element, symbol H) ==== Derived terms ==== == Welsh == === Etymology === Borrowed from English hydrogen, from French hydrogène, from Ancient Greek ὕδωρ (húdōr, “water”) + γεννάω (gennáō, “to bring forth”). === Pronunciation === (North Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɨ̞drɔˌɡɛn/ (South Wales) IPA(key): /ˈhədrɔˌɡɛn/, /ˈhɪdrɔˌɡɛn/ Rhymes: -ədrɔɡɛn, -ɨ̞drɔɡɛn === Noun === hydrogen m (uncountable, not mutable) hydrogen Synonyms: ulai, ulnwy ==== Derived terms ==== === 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