Glossadex
The proposed reference tool in the back of textbooks, and non-fiction books, in which the standard "glossary" and "index" have been combined to make studying more efficient. It's pointless for a book to have two separate reference tools when their functions are similar enough to warrant combination. Also, publishers can save money on paper and ink, making the overall cost of the book lower for the student/consumer. It's a win-win.
"Ugh I can't find that term anywhere in this stupid chapter."
"Have you tried checking the glossadex?"
"Have you tried checking the glossadex?"