hydrogen

CEFRC1

/ˈhaɪdɹəd͡ʒ(ə)n/

noun

Türkçe translations

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In plain English

  1. 01

    noun

    A very light gas that is the simplest chemical element.

  2. 02

    noun

    Extra detail

    Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.

Examples

  • Hydrogen and oxygen combine to form water.

  • This substance is mostly composed of hydrogen and oxygen.

At a glance

Sits at C1 on the CEFR scale

Senses
5
Parts of speech
1
Citations
5
Synonyms
5

Deep Dive

noun

Extra meanings

  1. The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.

  2. An atom of this element.

  3. A molecule of this molecular species.

More examples

In context

  • The chemical symbol H indicates hydrogen.

  • A large tank of hydrogen constituted most of the bulk of that rocket.

  • Each carbon of the ring has one hydrogen attached except for the fourth one, which is bonded to a substituent.

Synonyms

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Origin

noun

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- (“t...