<dl>
  <dt>Firefox</dt>
  <dt>Mozilla Firefox</dt>
  <dt>Fx</dt>
  <dd>A free, open source, cross-platform, graphical web browser
      developed by the Mozilla Corporation and hundreds of volunteers.</dd>

  <!-- other terms and definitions -->
</dl>

body {margin:30px}
dt{font-weight: bold}
dd{margin-left:2em;}