1. 
   Data Dictionary
   A data dictionary is a repository of descriptive information about data. Data dictionary information includes database elements and valid values used to describe datasets.
   Found op http://www-v0ims.gsfc.nasa.gov/v0ims/glossary.of.terms.html
   
   
2. 
   data dictionary
   (database) A data structure that stores meta-data, i.e. data about data. The term 'data dictionary' has several uses. Most generally it is a set of data descriptions that can be shared by several applications. Usually it means a table in a database that stores the names, field types, length, and ot...
   Found op http://foldoc.org/data+dictionary
   
   
3. 
   Data dictionary
   A data dictionary, or metadata repository, as defined in the IBM Dictionary of Computing, is a "centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format." The term may have one of several closely related meanings pertaining to database...
   Found op http://en.wikipedia.org/wiki/Data_dictionary
   
   

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