Definitions

1. noun

A colorless, odorless, highly flammable, gaseous element that is the lightest and most abundant chemical element in the universe and is used in the production of hydrogen gas and liquid fuels.

“The scientist studied the properties of hydrogen to develop a new source of clean energy.”

2. adjective

Relating to or derived from hydrogen, especially relating to the properties of hydrogen or the production of hydrogen fuels.

“Hydrogen-powered vehicles are becoming increasingly popular due to their environmental benefits.”