Source : WordNet®

Cd
     n 1: a soft bluish-white ductile malleable toxic bivalent
          metallic element; occurs in association with zinc ores
          [syn: {cadmium}, {atomic number 48}]
     2: the basic unit of luminous intensity adopted under the
        Systeme International d'Unites; equal to 1/60 of the
        luminous intensity per square centimeter of a black body
        radiating at the temperature of 2,046 degrees Kelvin [syn:
         {candle}, {candela}, {standard candle}]
     3: a debt instrument issued by a bank; usually pays interest
        [syn: {certificate of deposit}]
     4: a digitally encoded recording on an optical disk that is
        smaller than a phonograph record; played back by a laser
        [syn: {compact disk}, {compact disc}]

Source : Free On-Line Dictionary of Computing

CD
     
        {Compact Disc}

cd
     
        1.  {change directory}.
     
        2.  The {country code} for the Democratic Republic
        of the Congo (formerly Zaire, {zr}).
     
        (1999-01-27)