hydrogen
noun
hy·dro·gen ˈhī-drə-jən 
-dər-
: a nonmetallic gaseous chemical element with atomic number 1 that is the simplest and lightest of the elements and that is used especially in the processing of fossil fuels and the synthesis of ammonia see Chemical Elements Table compare deuterium, tritium
hydrogenous
hī-ˈdrä-jə-nəs
adjective 
Example Sentences
Recent Examples on the Web That would further delay a launch that last week was waived off twice because of other technical problems, including a massive leak of the liquid hydrogen the rocket uses for fuel. 
Christian Davenport, Washington Post, 7 Sep. 2022 Part of that was an earlier flow of the liquid hydrogen into the tank. Richard Tribou, Orlando Sentinel, 3 Sep. 2022 Afterward, the team will top off and replenish any of the liquid hydrogen and liquid oxygen that dissipates during the fueling process. Ashley Strickland, CNN, 2 Sep. 2022 That’s because the nuclear fusion reactions that make Betelgeuse shine have burned through almost all the hydrogen at its core. James Riordon, Scientific American, 18 Aug. 2022 Namely, how to create, store, and deliver the hydrogen in a safe and effective manner. Ben Baldanza, Forbes, 6 June 2022 Though hydrogen is a fuel option under the new regulations, cars that run on fuel cells have made up less than 1% of car sales in recent years. Kathleen Ronayne, Anchorage Daily News, 26 Aug. 2022 Though hydrogen is a fuel option under the new regulations, cars that run on fuel-cells have made up less than 1% of car sales in recent years. Kathleen Ronayne, ajc, 25 Aug. 2022 The 14 new trains, manufactured by French company Alstom, are powered by hydrogen fuel cells and are emission-free. Harold Maass, The Week, 25 Aug. 2022 See More
Christian Davenport, Washington Post, 7 Sep. 2022 Part of that was an earlier flow of the liquid hydrogen into the tank. Richard Tribou, Orlando Sentinel, 3 Sep. 2022 Afterward, the team will top off and replenish any of the liquid hydrogen and liquid oxygen that dissipates during the fueling process. Ashley Strickland, CNN, 2 Sep. 2022 That’s because the nuclear fusion reactions that make Betelgeuse shine have burned through almost all the hydrogen at its core. James Riordon, Scientific American, 18 Aug. 2022 Namely, how to create, store, and deliver the hydrogen in a safe and effective manner. Ben Baldanza, Forbes, 6 June 2022 Though hydrogen is a fuel option under the new regulations, cars that run on fuel cells have made up less than 1% of car sales in recent years. Kathleen Ronayne, Anchorage Daily News, 26 Aug. 2022 Though hydrogen is a fuel option under the new regulations, cars that run on fuel-cells have made up less than 1% of car sales in recent years. Kathleen Ronayne, ajc, 25 Aug. 2022 The 14 new trains, manufactured by French company Alstom, are powered by hydrogen fuel cells and are emission-free. Harold Maass, The Week, 25 Aug. 2022 See More Word History
Etymology
French hydrogène, from hydr- + -gène -gen; from the fact that water is generated by its combustion
First Known Use
1788, in the meaning defined above
Phrases Containing hydrogen
Kids Definition
hydrogen
noun
hy·dro·gen ˈhī-drə-jən
: a colorless, odorless, and tasteless flammable gas that is the lightest of the chemical elements
Medical Definition
hydrogen
noun
hy·dro·gen ˈhī-drə-jən
: a nonmetallic element that is the simplest and lightest of the elements and that is normally a colorless odorless highly flammable diatomic gas —symbol H see deuterium, tritium Chemical Elements Table
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