Synonyms:
hydrogen, H, atomic_number_1
Meaning: 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
Usage examples
The doctor rekindled the light in the cylinder; the spiral became heated; the current of hydrogen came in a few minutes, and the gas dilated; but the balloon did not stir an inch.
On his head, which had been skilfully deprived of every scrap of hair, he adjusted a pleasant little cap of bright scarlet, held on by suction and inflated with hydrogen, and curiously like the comb of a cock.
Either of them, when seen in projection against the brilliant solar disk, appears white, not red, as against a background of sky. The quiescent prominences, whose elevation is often from forty thousand to sixty thousand miles, consist, as the spectroscope shows, mainly of hydrogen and helium.