Source : Webster's Revised Unabridged Dictionary (1913)

Spinning \Spin"ning\,
   a. & n. from {Spin}.

   {Spinning gland} (Zo["o]l.), one of the glands which form the
      material for spinning the silk of silkworms and other
      larv[ae].

   {Spinning house}, formerly a common name for a house of
      correction in England, the women confined therein being
      employed in spinning.

   {Spinning jenny} (Mach.), an engine or machine for spinning
      wool or cotton, by means of a large number of spindles
      revolving simultaneously.

   {Spinning mite} (Zo["o]l.), the red spider.

   {Spinning wheel}, a machine for spinning yarn or thread, in
      which a wheel drives a single spindle, and is itself
      driven by the hand, or by the foot acting on a treadle.

Source : WordNet®

spinning jenny
     n : an early spinning machine with multiple spindles