daughterboard
<hardware> (Or "daughter board", "daughtercard", "daughter
card") A {printed circuit board} that connects to the
{motherboard}. The daughterboard is typically smaller than
the motherboard.
A daughterdboard often adds to or supports the main functions
of the {motherboard}, unlike an {expansion card} which
provides some new function. For example, a post-release
hardware modification might be released as a daughterboard for
soldering onto the {motherboard}.
(2004-09-28)