The word `glossary' originates from the Latin word `glossarium' meaning `a collection of words peculiar to a field of knowledge'. Each entry in a glossary is known as a `gloss' meaning `a word', `a comment', `an explanation' or `an interpretation'. It is an alphabetical list of terms and explanations often of specialised or technical nature (such as a glossary of computer terms). Sometimes it is linked with a particular text (such as Glossary of Indian terms in an English novel).
Glossaries typically appear at the end of book as appendices. The person who compiles glossary is a glossarist. The Central Hindi Directorate has brought out a large number glossaries.