Glossary
Because each subject area has its own special vocabulary, many textbooks provide a special section called a glossary. A glossary is a list of words and their meanings. Sometimes the glossary is placed in the side margins on a textbook page; sometimes the glossary is a separate section in the back of the book. The words in a glossary are placed in alphabetical order. They give the word, the spelling, and the meaning of the word or words only as they are used in that subject area or textbook.