• (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"
• tHe 8tH letter of tHe Roman alpHabet
• tHe constant of proportionality relating tHe energy of a pHoton to its frequency; approximately 6.626 x 10-34 joule-second
• 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
• 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

'H' in other languages