stylus

n. writing instrument having a slender pointed shape; pointed instrument used on a pressure sensitive screen (Computers); phonograph needle; sharp tool used to cut grooves

A stylus (plural: styli or styluses) is a writing utensil. The word is also used for a computer accessory (PDAs). It usually refers to a narrow elongated staff, similar to a modern ballpoint pen. Many styluses are heavily curved to be held more easily. Styli were first used by the ancient Mesopotamians in order to write in cuneiform, usually made out of reeds that grew on the sides of the Tigris and Euphrates rivers and in marshes and down to Egypt where the Egyptians used styluses from sliced reeds with sharp points. Cuneiform was entirely based on the "wedge-shaped" mark that the end of a cut reed made when pushed into a clay tablet, hence the name "cuneiform" from Latin cuneus = "wedge".
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Noun
1. a sharp pointed device attached to the cartridge of a record player
(hypernym) device
(hyponym) phonograph needle, needle
(part-holonym) cartridge, pickup
(part-meronym) diamond point
2. a pointed tool for writing or drawing or engraving; "he drew the design on the stencil with a steel stylus"
(synonym) style
(hypernym) tool

n. style

(n.)
The needle-like device used to cut the grooves which record the sound on the original disc during recording of a phonograph record.
  

(n.)
That needle-shaped part at the tip of the playing arm of phonograph which sits in the groove of a phonograph record while it is turning, to detect the undulations in the phonograph groove and convert them into vibrations which are transmitted to a system (since 1920 electronic) which converts the signal into sound; also called needle. The stylus is frequently composed of metal or diamond.
  

(n.)
An instrument for writing. See Style, n., 1.
  

(n.)
A pen-shaped pointing device used to specify the cursor position on a graphics tablet.