Source : Webster's Revised Unabridged Dictionary (1913)

Stylus \Sty"lus\, n.
   In a photograph, a pointed piece which is moved by the
   vibrations given to the diaphragm by a sound, and produces
   the indented record; also, a pointed piece which follows the
   indented record, vibrates the diaphragm, and reproduces the
   sound.

Stylus \Sty"lus\, n. [L. stylus, or better stilus.]
   An instrument for writing. See {Style}, n., 1.

Source : WordNet®

stylus
     n 1: a sharp pointed device attached to the cartridge of a record
          player
     2: a pointed tool for writing or drawing or engraving; "he drew
        the design on the stencil with a steel stylus" [syn: {style}]
     [also: {styli} (pl)]