bobbin

noun

1. A spool or cylinder around which wire is coiled.

   “Ignition coils using a bobbin molded from high-performance polyester withstand open-circuit bench tests to 70kV.”

2. In a sewing machine, the small spool that holds the lower thread.

   “Wind the bobbin, place it in the machine, and raise the thread.”

3. The little rounded piece of wood at the end of a latch string, which is pulled to raise the latch.

   “She went from the linhay and boldly pulled the bobbin of the fuel-house door.”

   “Put the bobbin and the latch will go up”

4. A fine cord or narrow braid.