Moodle's Random glossary block pulls entries from a selected glossary and displays them in a block. It can pull entries from any glossary that is available from that course. In the following screenshot, you can see how to configure it:
Even though the name is Random glossary block, you can control the order in which the entries are pulled from the glossary and how often the block displays a new entry. For example, in the following screenshot, the Random glossary block is set to display each entry in order, and to change each day:
Here are some ideas for using the Random glossary block for something other than ...