adj 1 a  :  winding around a center or pole and gradually receding from or approaching it  b  :  HELICAL <the structure of DNA>   2  :  being a fracture in which the break is produced by twisting apart the bone <a double break>  spi*ral*ly adv 
, n 1  :  the path of a point in a plane moving around a central point while continuously receding from or approaching it  2  :  a three-dimensional curve (as a helix) with one or more turns about an axis <the double of DNA>  .
 
 
 
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