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English noun: H

1. H (substance) 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


Synonymsatomic number 1, hydrogen


Broader (hypernym)chemical element, element, gas


Narrower (hyponym)tritium


Substance meronymH2O, water

2. H (quantity) 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


Synonymshenry


Broader (hypernym)inductance unit


Part holonymabhenry, millihenry

3. h (quantity) the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second


SynonymsPlanck's constant


Broader (hypernym)constant of proportionality, factor of proportionality

4. H (communication) the 8th letter of the Roman alphabet


Broader (hypernym)alphabetic character, letter, letter of the alphabet


Member meronymLatin alphabet, Roman alphabet

5. H (attribute) (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure


SamplesEnthalpy is the amount of energy in a system capable of doing mechanical work.


Synonymsenthalpy, heat content, total heat


Broader (hypernym)physical property


Domain categorythermodynamics









Based on WordNet 3.0 copyright © Princeton University.
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