1. (noun)hydrogen, H, atomic number 1 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: enthalpy, henry, heatcontent, hydrogen, atomic number 1, total heat
2. (noun)henry, H 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: enthalpy, henry, heatcontent, hydrogen, atomic number 1, totalheat
3. (noun)Planck's constant, h the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second Synonyms: enthalpy, atomic number 1, heat content, hydrogen, h, henry, totalheat
5. (noun)heat content, total heat, enthalpy, H (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure Synonyms: enthalpy, henry, heat content, hydrogen, atomic number 1, totalheat
Synonyms and Antonyms of h 
