1. [ noun ] (physics) 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
Synonyms: henry
Related terms: inductance_unit millihenry abhenry
2. [ noun ] (chemistry) 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
Synonyms: hydrogen atomic_number_1
Related terms: gas chemical_element tritium water
3. [ noun ] the 8th letter of the Roman alphabet
Related terms: letter Roman_alphabet
4. [ noun ] (mathematics) the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10\-34 joule-second
Synonyms: planck's_constant
Related terms: constant_of_proportionality
5. [ noun ] (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
Synonyms: enthalpy total_heat heat_content

"enthalpy is the amount of energy in a system capable of doing mechanical work"

Related terms: physical_property thermodynamics
6. [ noun ] (medicine,pharmacology) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush
Synonyms: diacetyl_morphine horse junk scag shit smack diacetylmorphine heroin
Related terms: hard_drug opiate big_h lugsail
Similar spelling:   Ho