English dictionary

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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


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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