1. 
   descriptor
   (operating system) An integer, string or other small data value which refers to one of several objects allocated to a program by the operating system, usually the kernel. A common example is a Unix file descriptor which is a small integer that identifies an I/O channel. Another example is a refere...
   Found op http://foldoc.org/descriptor
   
   
2. 
   Descriptor
   Numerical representation of a molecular property, including bulk properties (e.g. log P, molecular weight), two-dimensional (2-D) features (atom connectivity`s) or three-dimensional (3-D) features (molecular shape). A complete set of descriptors comprises a fingerprint.
   Found op http://www.combichemistry.com/glossary_d.html
   
   
3. 
   descriptor
   noun a piece of stored information that is used to identify an item in an information storage and retrieval system
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=descriptor
   
   
4. 
   Descriptor
   A variable describing assets, used as an element of a risk index. For example, a volatility risk index, distinguishing high volatility assets from low volatility assets, could consist of several descriptors based on short term volatility, long term volatility, systematic and residual volatility, etc...
   Found op http://www.duke.edu/~charvey/Classes/wpg/bfglosd.htm
   
   
5. 
   descriptor
   an index term used to identify a record in a database. It can consist of a word, phrase, or alphanumerical term. It can describe the content of the record or be an arbitrary code. When a descriptor is descriptive, it can be an effective search parameter.
   Found op http://en.wikipedia.org/wiki/Glossary_of_information_science_terms
   
   
6. 
   Descriptor
   Numerical representation of a molecular property, including bulk properties (e.g. log P, molecular weight), two-dimensional (2-D) features (atom connectivity`s) or three-dimensional (3-D) features (molecular shape). A complete set of descriptors comprises a fingerprint.
   Found op http://www.combichemistry.com/glossary_d.html
   
   
7. 
   descriptor
   1) Form 2) Signifier 3) Word 4) Word form
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/descriptor/1
   
   

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