A Descriptor

1. That which describes; a word, phrase, etc. serving as a description.
   1. (computing) The name of a category of data in an information storage and retrieval system.
   2. (information science) A word that describes the subject of an article or book; an index term.
   3. (linguistics) A word or expression used to describe or identify something.

Synonyms

• (information science): index term