[noun] 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:ydrogen, atomic number 1
[noun] 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:enry
[noun] 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
[noun] the 8th letter of the Roman alphabet
[noun] (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" Synonyms:eat content, total eat, entalpy
