Source : WordNet®

smart card
     n : a plastic card containing a microprocessor that enables the
         holder to perform operations requiring data that is
         stored in the microprocessor; typically used to perform
         financial transactions

Source : Free On-Line Dictionary of Computing

smart card
     
        Any plastic card (like a credit card) with an embedded
        {integrated circuit} for storing information.
     
        Smart cards are being incorporated into soldier's dog-tags and
        used to store hospital patients' medical records.  This way
        they are always instantly accessible.
     
        Other uses are as a form of token in banking systems.  You
        could store electronic money on the card or less valuable
        tokens such as those given away by petrol companies which you
        collect to exchange for free gifts at a later date.  The idea
        being that one smart card is easier to carry around than a
        multitude of paper tokens.
     
        {news:alt.technology.smartcards}
     
        (1995-01-06)