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
- The eighth letter of the basic modern Latin alphabet.
Symbol
H
- Symbol for hydrogen.
- Symbol for a henry, a unit for measurement of electrical inductance in the International System of Units.
- IUPAC 1-letter abbreviation for histidine
Letter
H (uppercase, lowercase h)