hy·dro·gen (h  dr -jn)n. Symbol H A colorless, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe, used in the production of synthetic ammonia and methanol, in petroleum refining, in the hydrogenation of organic materials, as a reducing atmosphere, in oxyhydrogen torches, and in rocket fuels. Atomic number 1; atomic weight 1.00794; melting point -259.14°C; boiling point -252.8°C; density at 0°C 0.08987 gram per liter; valence 1. See Table at element. [French hydrogène : Greek hudro-, hydro- + French -gène, -gen.] hy·drog e·nous (-dr j-ns) adj. |
hydrogen [ˈhaɪdrɪdʒən]
n
(Chemistry / Elements & Compounds)
a. a flammable colourless gas that is the lightest and most abundant element in the universe. It occurs mainly in water and in most organic compounds and is used in the production of ammonia and other chemicals, in the hydrogenation of fats and oils, and in welding. Symbol: H; atomic no.: 1; atomic wt.: 1.00794; valency: 1; density: 0.08988 kg/m3; melting pt.: -259.34°C; boiling pt.: -252.87°C See also deuterium, tritium
b. (as modifier) hydrogen bomb
[from French hydrogène, from hydro- + -gen; so called because its combustion produces water]
| hydrogen (hdr-jn) Symbol H The lightest and most abundant element in the universe, normally consisting of one proton and one electron. It occurs in water in combination with oxygen, in most organic compounds, and in small amounts in the atmosphere as a gaseous mixture of its three isotopes (protium, deuterium, and tritium) in the colorless, odorless compound H2. Hydrogen atoms are relatively electropositive and form hydrogen bonds with electronegative atoms. In the Sun and other stars, the conversion of hydrogen into helium by nuclear fusion produces heat and light. Hydrogen is used to make rocket fuel, synthetic ammonia, and methanol, to hydrogenate fats and oils, and to refine petroleum. The development of physical theories of electron orbitals in hydrogen was important in the development of quantum mechanics. Atomic number 1; atomic weight 1.00794; melting point -259.14°C; boiling point -252.8°C; density at 0°C 0.08987 gram per liter; valence 1. See Periodic Table. See Note at oxygen. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  hydrogen - a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universetritium - a radioactive isotope of hydrogen; atoms of tritium have three times the mass of ordinary hydrogen atoms chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter H2O, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely |
Translations
hydrogen [ˈhaɪdrədʒən] n → hydrogène m
hydrogen bomb n → bombe f à hydrogène
hydrogen peroxide n → eau f oxygénée
hydrogen bomb n → bombe f à hydrogène
hydrogen peroxide n → eau f oxygénée
hydrogen
hydrogen:
n → Wasserstoff m, → Hydrogenium nt (spec)
hydrogen:
hydrogen bomb
n → Wasserstoffbombe f
hydrogen bond
n → Wasserstoffbrücke(nbindung) f
hydrogen sulphide
n (= gas) → Schwefelwasserstoff m
n hydrogen [ˈhaidrədʒən]
an element, the lightest gas, which burns and which, when combined with oxygen, produces water. waterstof هيدروجين водород vodík brint; hydrogen der Wasserstoff υδρογόνο hidrógeno vesinik هيدروژن vety hydrogène מֵימָן हाइड्रोजन, उदजन vodik hidrogén hidrogen vetni idrogeno 水素 수소 vandenilis ūdeņradis hidrogen waterstof vannstoff, hydrogen wodór hidrogénio hidrogen водород vodík vodik hidrogen väte ก๊าซไฮโดรเจน hidrojen 氫 водень ہائڈروجن، ایک بے رنگ، بے مزا، بے بو گیسی عنصر Hyđrô 氢
hydrogen bomb [ˈeitʃbom]
a very powerful bomb in which the explosion is caused by turning hydrogen into helium at a very high temperature. waterstofbom قُنْبُلة هيدروجينيَّه водородна бомба vodíková puma brintbombe die Wasserstoffbombe βόμβα υδρογόνου bomba de hidrógeno vesinikupomm بمب هيدروژنی vetypommi bombe à hydrogène פִּצצַת מֵימָן हाइड्रोजन बम H-bomba, hidrogenska bomba hidrogénbomba bom H vetnissprengja bomba all'idrogeno 水素爆弾 수소 폭탄 vandenilinė bomba ūdeņraža bumba bom hidrogen waterstof-, H-bom vannstoff-/hydrogenbombe bomba wodorowa bomba de hidrogénio bombă cu hidrogen водородная бомба vodíková bomba vodikova bomba hidrogenska bomba vätebomb ระเบิดไฮโดรเจน hidrojen bombası 氫彈 воднева бомба نہایت طاقتور بم bom khinh khí 氢弹
hydrogen → هيدروجين vodík brint Wasserstoff υδρογόνο hidrógeno vety hydrogène hidrogen idrogeno 水素 수소 waterstof hydrogen wodór hidrogénio, hidrogênio водород väte แก๊สไฮโดรเจน hidrojen hyđrô 氢
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