knop

noun4

1. •
   A knob, usually ornamental

   • The thin shaft of each stick, composed of two cylinders on either side of a central knop, is engraved with a scrollwork pattern known as vermicule for its wormlike appearance. — 1992
2. •
   A finial, or swelling termination
3. •
   A closed bud or bud-like, swelling protuberance of a plant, or the representation thereof in the decorative arts
4. •
   A tuft or overthickened bunch of looped or twisted yarn