H

H (http://definr.com/H)

     n 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
          [syn: hydrogen, H, atomic number 1]
     2: 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 [syn: henry, H]
     3: the constant of proportionality relating the energy of a
        photon to its frequency; approximately 6.626 x 10\-34
        joule-second [syn: Planck's constant]
     4: the 8th letter of the Roman alphabet [syn: H]
     5: a narcotic that is considered a hard drug; a highly
        addictive morphine derivative [syn: heroin, diacetylmorphine,
         H, horse, junk, scag, shit, smack]