Definition of hydrogen in English:

hydrogen

Syllabification: hy·dro·gen
Pronunciation: /ˈhīdrəjən
 
/

noun

A colorless, odorless, highly flammable gas, the chemical element of atomic number 1. (Symbol: H)

Hydrogen is the lightest of the chemical elements and has the simplest atomic structure, a single electron orbiting a nucleus consisting of a single proton. It is by far the most common element in the universe, although not on the earth, where it occurs chiefly combined with oxygen as water

More example sentences
  • We know that the Moon is low on certain chemicals such as hydrogen and carbon.
  • Chemically, oil is made up of chains of carbon, hydrogen and oxygen called fatty acid.
  • It was a very dry world, almost no water, and not much carbon, hydrogen or oxygen either.

Origin

late 18th century: coined in French from Greek hudro- 'water' + -genēs (see -gen).

Derivatives

hydrogenous

Pronunciation: /hīˈdräjənəs/
adjective
More example sentences
  • Based on new results, the role played by hydrogenous species in the generation is explored.
  • In the U.S., we import almost everything under the sun, and many of those imports are hydrogenous.
  • These materials are made of a low density solid hydrogenous material which binds a powder of medium density materials.

Definition of hydrogen in:

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something