Inside the Universes

'hydrogen'

[hydrogen.n.01] as in: 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

Origins

					hydrogen (English)
└── hydrogène (French)
    ├── -gène (French)
    └── hydro- (French)
        └── ὑδρο- (Ancient Greek (to 1453))