Hertz
     n 1: the unit of frequency; one Hertz has a periodic interval of
          one second [syn: {Hz}, {cycle per second}, {cycles/second},
           {cps}, {cycle}]
     2: German physicist who was the first to produce
        electromagnetic waves artificially (1857-1894) [syn: {Heinrich
        Hertz}, {Heinrich Rudolph Hertz}]
     3: German physicist who with James Franck proved the existence
        of the stationary energy states postulated by Bohr
        (1887-1975) [syn: {Gustav Hertz}, {Gustav Ludwig Hertz}]
Source: WordNet® 2.0