h

Reading level: medium

Estimated CEFR level: B1 — Intermediate

Estimated from word frequency; not an official CEFR classification.

Definition

noun 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 a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
noun the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second

Abbreviations

‘H’m! how sensible of you. — The Idiot, Fyodor Dostoyevsky
FOOTNOTES: [H] Sir John Suckling. — Old Christmas: from the Sketch Book of Washington Irving, Washington Irving
"H'm," let out Ganz slowly. — The best short stories of 1917, and the yearbook of the American short story, Unknown

hydrogen, atomic number 1

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