hydrogen
UK/'haɪdrədʒ(ə)n/US/'haidrәdʒәn/
IELTSTOEFLA2
Definitions
n.
The lightest chemical element (symbol H); a colourless, flammable gas
氢，氢气（最轻的化学元素，符号 H）
Root Breakdown
Root-derivedhydro- (water, from Greek hydōr) + -gen (producer) = 'water-producer.' Named because burning hydrogen in air produces water. The -gen 'producer' here is the same root as in oxygen and nitrogen.
Root hydr still carries 9 more wordsCommon Collocations
- 1.hydrogen fuel氢燃料
- 2.hydrogen bomb氢弹
- 3.hydrogen atom氢原子
- 4.hydrogen peroxide过氧化氢
Example Sentences
- 1.
Hydrogen is being tested as a clean fuel for cars.
- 2.
Burning hydrogen produces only water as a by-product.
- 3.
Water is made of two hydrogen atoms and one oxygen atom.