any cylindrical piece or device on which something is wound.

a small cylindrical piece of wood or other material on which yarn is wound in spinning, for use in weaving; a bobbin.

a small cylinder of wood or other material on which thread, wire, or tape is wound, typically expanded or with a rim at each end and having a hole lengthwise through the center.

the material or quantity of material wound on such a device.

Angling . the cylindrical drum in a reel that bears the line.

to wind on a spool.

to unwind from a spool (usually fol. by off or out ).

Computers . to operate (an input/output device) by using buffers in main and secondary storage.

to wind.

to unwind.

noun

bobbin , cylinder , reel , spindle