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hydrogen balloon. In DICTIOUS you will not only get to know all the dictionary meanings for the word
hydrogen balloon, but we will also tell you about its etymology, its characteristics and you will know how to say
hydrogen balloon in singular and plural. Everything you need to know about the word
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English
Noun
hydrogen balloon (plural hydrogen balloons)
- A type of gas balloon filled with hydrogen gas, and able to fly higher and further than a hot-air balloon.