Glossary

index
noun
bibliography, information science
"A list (as of bibliographical information or citations to a body of literature) arranged usually in alphabetical order of some specified datum (such as author, subject, or keyword): such as
  • a list of items (such as topics or names) treated in a printed work that gives for each item the page number where it may be found
  • a list of publicly traded companies and their stock prices
  • a bibliographical analysis of groups of publications that is usually published periodically"

Definition Source:  https://www.merriam-webster.com/dictionary/index