H
WordNet

noun


(1)   (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
"Enthalpy is the amount of energy in a system capable of doing mechanical work"
(2)   The 8th letter of the Roman alphabet
(3)   The constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
(4)   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
(5)   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
WiktionaryText

Letter



  1. The eighth letter of the basic modern Latin alphabet.

Symbol


H
  1. Symbol for hydrogen.
  2. Symbol for a henry, a unit for measurement of electrical inductance in the International System of Units.
  3. IUPAC 1-letter abbreviation for histidine

Letter


H (uppercase, lowercase h)
  1. The eighth letter of the English alphabet, preceded by G and followed by I.

Abbreviation



  1. Hits, the number of hits by a given batter in a given season.
  2. A grade of pencil with lead that makes lighter marks than a pencil grade HB but darker marks than a pencil of grade 2H; a pencil with hard lead.
 
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