nib

The sharpened point of a quill pen.

A tapered point of a pen, designed to be inserted into a penholder or fountain pen.

A sharp point or tip.

A bird’s beak or bill.

To nibble.

To furnish with a nib or point; mend or trim the nib of, as a pen.

The beak or bill, as of a bird; neb.

The point of anything, as the pointed end of a pen or the extremity or toe of a crowbar.

A small pen of the usual form for insertion in a penholder.