Source : Free On-Line Dictionary of Computing

Cascading Style Sheets
     
         (CSS) An extension to {HTML} to allow styles,
        e.g. colour, {font}, size to be specified for certain elements
        of a {hypertext} document.  Style information can be included
        in-line in the HTML file or in a separate CSS file (which can
        then be easily shared by multiple HTML files).  Multiple
        levels of CSS can be used to allow selective overriding of
        styles.
     
        {Home (http://www.w3.org/Style/CSS/)}.
     
        (2000-07-26)