spool

Short definition from Wiktionary

Noun

1. 1
   A reel; a device around which thread, wire or cable is wound, especially a cylinder or spindle.
2. 2
   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.
3. 3
   A temporary storage area for electronic mail, etc.
4. 4
   A splinter caught in the skin.
5. 5
   A small swimming pool that can be used also as a spa.

Verb

1. 1
   To wind on a spool or spools.
2. 2
   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).