dt elementdd or dt elements inside dl elements.header, footer, sectioning content, or heading content descendants.HTMLElement.The dt element represents the term, or
  name, part of a term-description group in a description list
  (dl element).
The dt element itself, when used in a
  dl element, does not indicate that its contents are a
  term being defined, but this can be indicated using the
  dfn element.
This example shows a list of frequently asked questions (a FAQ)
   marked up using the dt element for questions and the
   dd element for answers.
<article> <h1>FAQ</h1> <dl> <dt>What do we want?</dt> <dd>Our data.</dd> <dt>When do we want it?</dt> <dd>Now.</dd> <dt>Where is it?</dt> <dd>We are not sure.</dd> </dl> </article>