Pagelet
<World-Wide Web> A component of an
HTML page, that contains directives, layout, and code in a single context.
A pagelet may be a separate file or
web page that contains information you want displayed across several pages.
They are similar to
server-side include files, as implemented in ASP+.
Pagelets act like independent HTML frames and provide discrete access to content.
They use
Cascading Style Sheets as templates for defining their layout behavior in a single context.
[.NET Framework Essentials, 2nd Edition, Thuan L. Thai and Lam Hoang, February 2002, 0-596-00302-1]