spool

A reel; a device around which thread, wire or cable is wound, especially a cylinder or spindle.

If you need to reload film, the cassette can be rewound slightly by turning the hub located on one end of its spool.

One of the rotating assemblies of a gas turbine engine, composed of one or more turbine stages, a shaft, and one or more compressor or fan stages.

The high-pressure spool rotates faster than the intermediate- and low-pressure spools, as the high-pressure turbine is driven by superheated combustion gases straight out of the burners, while the high-pressure compressor has to spin very fast to compress air that has already been compressed and heated by the low- and intermediate-pressure compressors.

A temporary storage area for electronic mail, etc.

A splinter caught in the skin.

To wind on a spool or spools.

To send files to a device or a program (a spooler or a daemon that puts them in a queue for processing at a later time).

A small swimming pool that can be used also as a spa.