Definitions and Synonyms of hydrogen | Another word for hydrogen | What is hydrogen?
Definition 1: a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe - [noun denoting substance]
Synonyms for hydrogen in the sense of this definition
(hydrogen is a kind of ...) any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
(... is made of the substance hydrogen) binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent