Source : Webster's Revised Unabridged Dictionary (1913)

Nib \Nib\, n. [A variabt of neb.]
   1. A small and pointed thing or part; a point; a prong. ``The
      little nib or fructifying principle.'' --Sir T. Browne.

   2. (Zo["o]l.) The bill or beak of a bird; the neb.

   3. The points of a pen; also, the pointed part of a pen; a
      short pen adapted for insertion in a holder.

   4. One of the handles which project from a scythe snath;
      also, [Prov. Eng.], the shaft of a wagon.

Nib \Nib\, v. t. [imp. & p. p. {Nebbed}; p. pr. & vb. n.
   {Nibbing}.]
   To furnish with a nib; to point; to mend the point of; as, to
   nib a pen.

Source : WordNet®

nib
     n 1: the writing point of a pen [syn: {pen nib}]
     2: horny projecting mouth of a bird [syn: {beak}, {bill}, {neb},
         {pecker}]
     [also: {nibbing}, {nibbed}]