Hydrogen

Pronunciation

• IPA: /ˈhaɪdɹədÊ’É™n/
• Hyphenation: hy + dro + gen

Origin

From French hydrogène, coined by Louis-Bernard Guyton de Morveau, from Ancient Greek ὕδωρ (hudōr, "water") + γεννάω (gennaō, "I bring forth").

Full definition of hydrogen

Noun

1. The lightest chemical element (symbol H) with an atomic number of 1 and atomic weight of 1.00794.
2. Molecular hydrogen (H₂), a colourless, odourless and flammable gas at room temperature.
3. An atom of the element.
4. A sample of the element.

Synonyms

• waterstuff

Derived terms

Related terms

Synonyms

• E949 when used as a packaging agent

Hyponyms

• deuterium
• protium
• tritium