nib

1. The tip of a pen or tool that touches the surface, transferring ink to paper.
2. The bill or beak of a bird; the neb.
3. Bits of trapped dust or other foreign material that form imperfections in painted or varnished surfaces.
4. A piece of a roasted, hulled cocoa bean.
5. A small and pointed thing or part; a point; a prong.
6. One of the handles projecting from a scythe snath.
7. The shaft of a wagon.

verb

To fit (a pen) with a nib.