How to Create HTML Definition Lists

To create a list of definitions in HTML, begin with the <dl>
tag, and list each term inside of <dt>these tags</dt>. Then list each definition inside of <dd>these tags</dd>. When you are finished, close your definition list with the </dl> tag.

These tags will turn this:

<dl>
<dt>SEM</dt>
<dd>Search Engine Marketing</dd>
<dt>SEO</dt>
<dd>Search Engine Optimization</dd>
</dl>

into this:

SEM

Search Engine Marketing

SEO

Search Engine Optimization

This is most likely what Google pulls from in order to serve up definition results.