Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: chemistry, natural-sciences, physical-sciences
Synonyms: none provided
Antonyms: none provided
noun
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
An atom of this element.
Definition source: English Wiktionary via Wiktextract
Usage: countable
Topics: chemistry, natural-sciences, physical-sciences
Synonyms: none provided
Antonyms: none provided
noun
Molecular hydrogen (sense 1; symbol H2), a colourless, odourless and flammable gas at room temperature.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: chemistry, natural-sciences, physical-sciences
Synonyms: none provided
Antonyms: none provided
noun
Molecular hydrogen (sense 1; symbol H2), a colourless, odourless and flammable gas at room temperature.
A molecule of this molecular species.
Definition source: English Wiktionary via Wiktextract
Usage: countable
Topics: chemistry, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, 1H, or 11H), as contrasted with deuterium and tritium”).
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Topics: chemistry, natural-sciences, physical-sciences
Synonyms: protium
Antonyms: none provided
noun
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 universe
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: H, atomic number 1
Antonyms: none provided
Broader terms: chemical element, element, gas
Narrower terms: tritium
History
Etymology tree Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Hellenic *údōr Ancient Greek ῡ̆̔́δωρ (hū̆́dōr) Ancient Greek ὑδρο- (hudro-)lbor. French hydro- Proto-Indo-European *ǵenh1- Proto-Indo-European *-os Proto-Indo-European *ǵénh1os Proto-Hellenic *génos Ancient Greek γένος (génos) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -γενής (-genḗs)lbor. French -gène French hydrogènebor. English hydrogen 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).
Across languages
238 source translations are retained for this English entry.
