Subluxation: Partial dislocation of a joint. A complete dislocation is a luxation.
The largest number of items per content database that has been tested on SharePoint Server 2013 is 60 million items, including documents and list items. If you plan to store more than 60 million items in SharePoint Server 2013, you must deploy multiple content databases.
If you do not use host-named site collections, your SharePoint web application will contain many path-based site collections that share the same host name (DNS name). For example, Team A has a site collection at http://contoso.com/sites/teamA, and Team B has a site collection at http://contoso.com/sites/teamB.