# Master dictionary

The master dictionary (md) file contains commands, Procs,
macros, menus, connectives, default attribute-defining items, and
file-defining items [both local (D-pointers) and synonym (Q-pointers)].

The master dictionary is the root of the database table
structure. By convention, the location of the master dictionary on
the network is the location of the database, even though the tables
in the database can be on another server.

There is one master
dictionary file for each account. When a new account is created, a
standard set of vocabulary items are copied into the new account’s
master dictionary. File-defining items (D-pointers) and synonym-defining
items (Q-pointers) are two types of file pointers found in a master
dictionary. File-defining items point to files within the current
account. Synonym-defining items can point to files either within the
current account or within other accounts.

## See also

- [Account](https://d3codex.com/definitions/account-glossary/)
- [attribute-type](https://d3codex.com/attributedefiningitem/attribute-type/)
- [listverbs command](https://d3codex.com/tcl/listverbs-command/)
- [Master dictionary file](https://d3codex.com/systemfiles/master-dictionary-file/)
- [Pointer item](https://d3codex.com/definitions/pointer-item/)

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Source: https://d3codex.com/definitions/master-dictionary/ - part of the D3Codex reference.