[1] : The Collaborative International Dictionary of English v.0.48

jenny \jen"ny\, n. a corruption of gin an engine; influenced by
   jenny, the proper name. see gin an engine, and cf.
   ginny-carriage.
   a machine for spinning a number of threads at once, -- used
   in factories. also called spinning jenny.
   1913 webster
see also:
gin ginny-carriage spinning jenny 

[2] : The Collaborative International Dictionary of English v.0.48

spinning \spin"ning\,
   a.  n. from spin.
   1913 webster

   spinning gland zool., one of the glands which form the
      material for spinning the silk of silkworms and other
      larvae.

   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 zool., 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.
      1913 webster
see also:
spin spinning gland spinning house spinning jenny spinning mite spinning wheel 

[3] : WordNet (r) 2.0

spinning jenny
     n : an early spinning machine with multiple spindles

Spinning Jenny >> S Words
Spinning Jenny, definition of term: Spinning Jenny
spinning+jenny_pag1.html

Jenny >> J Words
Jenny, definition of term: Jenny
jenny_pag1.html

Spinning >> S Words
Spinning, definition of term: Spinning
spinning_pag1.html

Spinning Wheel >> S Words
Spinning Wheel, definition of term: Spinning Wheel
spinning+wheel_pag1.html

Jenny Wren >> J Words
Jenny Wren, definition of term: Jenny Wren
jenny+wren_pag1.html