nib

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The sharpened point of a quill pen.
• noun A tapered point of a pen, designed to be inserted into a penholder or fountain pen.
• noun A sharp point or tip.
• noun A bird's beak or bill.

from The Century Dictionary.

• noun The tip or growing point of an oyster-shell.
• noun The button or nodule of graphitic carbon which is sometimes deposited upon the negative terminal by an electric arc between carbon poles.
• To furnish with a nib or point; mend or trim the nib of, as a pen.
• To nibble.
• noun The beak or bill, as of a bird; neb.
• noun The point of anything, as the pointed end of a pen or the extremity or toe of a crowbar.
• noun A small pen of the usual form for insertion in a penholder.
• noun The handle of a scythesnath, to which it is attached by a sliding ring that can be tightened by a bolt or wedge.
• noun A separate adjustable limb of a permutation-key.
• noun In the picker of a loom fitted with a drop-box for carrying two or more shuttles, a projection from the back side of the picker, working in a groove or guide-way, and coöperating with the pickerspindle to reduce friction and cause the picker to strike squarely against the end of the shuttle.
• noun See coffee-nib and cacao.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To furnish with a nib; to point; to mend the point of.
• noun A small and pointed thing or part; a point; a prong.
• noun (Zoöl.) The bill or beak of a bird; the neb.
• noun The points of a pen; also, the pointed part of a pen; a short pen adapted for insertion in a holder.
• noun Prov. Eng., Prov. Eng. One of the handles which project from a scythe snath
• noun See his nibs, below.
• noun [Colloq.] Someone who gives a command or makes a demand, often one who acts in a self-important manner, sometimes one with authority; -- used mockingly as a jocose term, as if a title of honor, but not usually in the presence of the person referred to, and usually indicating resentment or contempt.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The tip of a pen or tool that touches the surface.
• noun The bill or beak of a bird; the neb.
• noun Bits of trapped dust or other foreign material that form imperfections in painted or varnished surfaces.
• noun Partially processed cocoa bean.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun horny projecting mouth of a bird
• noun the writing point of a pen