What is the meaning of Descriptor?

That which describes; a word, phrase, etc. serving as a description.

1. A name associated with certain data or documents in an information storage and retrieval system; an index term.

   A name associated with certain data or documents in an information storage and retrieval system; an index term.

   A word or expression used to describe or identify something.

   descriptive

   descriptor (name associated with data or documents)

   descriptor (that which describes)

   descriptor (that which describes)

   descriptor (that which describes)

   Source: wiktionary.org