Glossaries
Free plugins available at WordPress.org
WP Glossary
Build a glossary on your site, and link terms in your posts to it. This first version does two things:
1. Adds a glossary custom post type for storing your glossary terms.
2. Adds a glossary shortcode to allow you to link your content to your glossary terms.
Explanatory Dictionary
This plugin is used when there are words, word expressions ,or sentences to be explained in the posts or pages of your wordpress blog. It will help the visitors to read the explanations of the words (word expressions, sentences) you need via tooltips. It can also be used as a glossary.
WordPress Tooltips
is a simple & quick , light & powerful jQuery tooltips solution that allows you use tooltips for words, phases, images, links, shortcode, next-gen descriptions, wordpress menus, and so on.
Can be used as a glossary, as well.
Author: Tomas.zhu