Webster's English Dictionary

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coil

1. coil \'ko.i(*)l\ n [origin unknown] 1: TUMULT  2: TROUBLE 
2. coil vb [MF coillir to collect] 1: to wind into rings or sprirals  2: to 
   roll or twist into a shape resembling a coil  1: to move in a circular, 
   spiral, or winding course  2: to form or lie in a coil 
3. coil n 1a: a series of loops or a spiral  1b: a single loop of such a 
   coil  2: a number of turns of wire esp. in spiral form usu. for 
   electromagnetic e ffect or for providing electrical resistance 3: a series 
   of connected pipes in rows, layers, or windings