hydrogen
noun
hy·dro·gen
| \ ˈhī-drə-jən
, -dər-\
, -dər-\
Definition of hydrogen
: 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
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Other Words from hydrogen
hydrogenous
\ hī-ˈdrä-jə-nəs
\
adjective
\
adjective
Examples of hydrogen in a Sentence
Recent Examples on the Web
The hydrogen-burning RL10B-2 second-stage engine then fired up to continue the climb to orbit. — William Harwood, CBS News, "Rocket launches GPS satellite into orbit for U.S. Air Force," 22 Aug. 2019 Fossil-fuel-dependent refineries and hydrogen production were responsible for a third of that, while the rest came from sources such as extraction of oil and gas, cement plants, glass manufacturers and food processors. — J.d. Morris, SFChronicle.com, "Clean energy powers California climate emissions drop," 12 Aug. 2019 Green hydrogen and the electrification of green electricity supply in ports will provide even more options to decarbonize the sector. — Luis Alfonso De Alba For Cnn Business Perspectives, CNN, "The shipping industry must go carbon neutral to survive," 8 Aug. 2019 However, the hydrogen and helium gas on WASP-121b is outflowing, akin to a river, dragging the metals with them, Sing continued. — Fox News, "NASA discovers 'extreme' alien planet that's shaped like a football," 2 Aug. 2019 Aside from extending credits for building electric, plug-in hybrid and hydrogen fuel vehicles, the deal also hikes the cap for winning credits for fuel efficiency improvements not captured by traditional testing. — Reuters, The Mercury News, "Four automakers, California strike compromise on vehicle emissions," 25 July 2019 Future prospects are buoyed by Fukuoka Smart East, a 124-acre smart city campus in Hakozaki district that will be a playground (and showroom) for Internet-of-things prototypes and hydrogen power, with its own accelerator division within FGN. — Richard Morgan, Fortune, "Japan’s Would-Be Silicon Valley Wants You," 23 July 2019 Nichols said engineers expect to finish testing the liquid hydrogen tank by the end of August. — Lee Roop | Lroop@al.com, al.com, "‘We’re good here,’ NASA test engineer says of SLS stress testing," 19 July 2019 Carruthers saw an opportunity to answer the hydrogen question—and gain a unique look at the gases surrounding Earth. — Daniel Clery, Science | AAAS, "Could humanity’s return to the moon spark a new age of lunar telescopes?," 18 July 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for hydrogen
hydrogen
noun
English Language Learners Definition of hydrogen
: a chemical element that has no color or smell and that is the simplest, lightest, and most common element
See the full definition for hydrogen in the English Language Learners Dictionary
hydrogen
noun
hy·dro·gen
| \ ˈhī-drə-jən
\
\
Kids Definition of hydrogen
: a colorless, odorless, and tasteless flammable gas that is the lightest of the chemical elements
hydrogen
noun
hy·dro·gen
| \ ˈhī-drə-jən
\
\
Medical Definition of hydrogen
: 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
Other Words from hydrogen
hydrogenous
\ hī-ˈdräj-ə-nəs
\
adjective
\
adjective
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