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DictionarybobbinThread spool
noun

bobbin

BOB-in/ˈbɑːbɪn/

A small spool for holding thread, yarn, or wire.

Blue thread winds around the bobbin between its circular flanges.

A close-up of a small sewing-machine bobbin wound with blue thread, its two circular flanges and central axle hole clearly visible, with a short loose thread tail curling onto the white surface.
Etymology
bobbinFrenchspool for thread

French bobine already named a small sewing or tapestry-making instrument. The English word preserves that practical sense: a spool around which thread or yarn is wound; its deeper origin is uncertain.

In context

SewingMastery.com6:22
for when you thread the machine so we just clipped our thread after we wound our bobbin
Singer Heavy Duty 4452 4 Threading & Winding a Bobbin

More examples

  • The lower bobbin ran out halfway through the seam.
  • A drawer holds bobbins in many colors.
  • He replaces the bobbin before continuing to stitch.

Forms

bobbin · bobbins

Similar words

spool
A general thread holder, not necessarily the machine's lower holder.
reel
Often a larger rotating holder for line, film, or cable.