hydrogen

noun

hy·​dro·​gen ˈhī-drə-jən How to pronounce hydrogen (audio)
-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
often used before another noun
hydrogen gas
hydrogen atoms
a hydrogen vehicle
the hydrogen industry
see Chemical Elements Table compare deuterium, tritium
hydrogenous adjective

Examples of hydrogen in a Sentence

Recent Examples on the Web Under the program, state residents making 300% or below the federal poverty level in household income are eligible to apply for a rebate on an EV purchase or lease, provided the vehicle is $90,000 or less; hybrids and hydrogen vehicles are not eligible. Tj Martinell | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 3 Aug. 2024 Eventually enough will accumulate that the immense gravity will fuse the hydrogen, detonating what is in essence a thermonuclear bomb the size of a planet. Phil Plait, Scientific American, 2 Aug. 2024 At one point in the 1870s, a massive tethered hydrogen balloon was also tethered in front of the Louvre and carried some 36,000 royals, scholars, dignitaries and normal citizens up into the heavens. NBC News, 27 July 2024 That, too, honored French history: In the 18th century, the gardens were the site of the first hydrogen hot air balloon flight. Ira Porter, The Christian Science Monitor, 26 July 2024 See all Example Sentences for hydrogen 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hydrogen.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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

Time Traveler
The first known use of hydrogen was in 1788

Dictionary Entries Near hydrogen

Cite this Entry

“Hydrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrogen. Accessed 19 Aug. 2024.

Kids Definition

hydrogen

noun
hy·​dro·​gen ˈhī-drə-jən How to pronounce hydrogen (audio)
: a chemical element that is the simplest and lightest of all chemical elements and is normally found alone as a colorless odorless highly flammable gas having two atoms per molecule see element
hydrogenous adjective
Etymology

from French hydrogène "hydrogen," from hydr- "water" and -gène "producer"; so called because when hydrogen gas burns, it combines with oxygen to produce water

Medical Definition

hydrogen

noun
hy·​dro·​gen ˈhī-drə-jən How to pronounce hydrogen (audio)
: 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
hydrogenous adjective

More from Merriam-Webster on hydrogen

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