M

master

A system database in SQL Server 2005 used as the system catalog.

Materialized view

A view that physically exists through a number of underlying indexes that have been created on it.

Matrix layout

A component of a report used in SQL Server Reporting Services to display data using a cross-tab format.

Merge agent

The replication agent that applies the initial snapshot to the subscriber. It then moves and reconciles any changes that occur.

Merge replication

A replication type that relies on DML operations being captured from both the published database and the subscriber database(s) and automatically synchronized.

Typically starts with a snapshot of the publication. Uses triggers to track subsequent changes made at either the publisher or subscriber.

model

A system database in SQL Server 2005 used as a template for creating new databases.

msdb

A system database in SQL Server primarily used to provide support for the SQL Server Agent.