needle
  • noun a thin hard leaf of a conifer
  • A slender and pointed object, or that resembling such an object. For instance, the shape of the magnetizable particles on the surface a magnetic tape or disk is that of a needle. 2. A needle (1) which serves to convey information in a meter, gauge, or similar device or instrument. A specific example is that used in a D'Arsonval galvanometer. Also called needle pointer, indicator needle, or pointer needle.
  • A pointed object which extends from a phonographic pickup, and which serves to follow the undulations of the grooves of a phonographic disc and transmit them as vibrations to said pickup. Such an object is usually made of a metal needle with a diamond or sapphire tip. Also called stylus (3).
  • A needle in a magnetic compass. Also called magnetic needle.

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