1. A nonmetallic univalent element that is normally a colourless and odourless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
   - H, atomic number 1

Derived forms: hydrogens

See also: hydrogenate

Type of: chemical element, element, gas

Part of: H2O, water

Encyclopedia: Hydrogen

• Nina
• Nina from Carolina
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• Nineteenth Amendment
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