hydrogen

🇺🇸 /ˈhaɪdrədʒən/ 🇬🇧 /ˈhaɪdrədʒən/
Frequency
Difficulty
Tags TOP10000Oxford5000
noun
C1

The lightest chemical element, a gas that combines with oxygen to make water.

Hydrogen is used as fuel because it burns cleanly and produces only water.

translation

n. The lightest chemical element, a gas that combines with oxygen to make water.

Word Forms

Plural hydrogens