headshell
Noun
Meaning
(music) A component of a record player that is attached to the end of a turntable arm. The cartridge is bolted to it.
(computing) A component of a Sun server, used to connect a console between two Sun machines. It is made up of a DB-25 male connector with a normal Cat-5 ethernet cable connecting to another DB-25 male connector.
Source: en.wiktionary.orgExamples
Many P-mount cartridges come with adapters to allow them to be mounted to a headshell.
The third type is used mainly in cartridges designed for DJ use and it has a standard round headshell connector.