If you are looking to add a popup box or window to define a word or term in WordPress (.org) you do not need a plug in to achieve this. Plugins slow your site down, meaning the pages will load slower. The more plugins you have, the slower your site becomes. Here’s the code you’ll use. It’s very simple, even for those who do not know html.
1. In your new WordPress post, click on the HTML tab above the toolbar. Find the word or term you wish to have a popup box or window appear.
2. Prior to the word or term, you add in the “less than” sign, the words “acronym” followed by an equal sign and an open quotation mark, you add what you wish the dialogue box to read, then close with a quotation mark and a greater than sign. After the word or term, (in this case “celiac disease”), you add a less than sign, forward slash, the word acronym, and a greater than sign. See below for an example. See image below for an example.
YOU’LL END UP WITH THIS:












