n, pl  he*li*ces  also  he*lix*es   1  :  the incurved rim of the external ear  2  :  a curve traced on a cylinder by the rotation of a point crossing its right sections at a constant oblique angle : broadly  :  SPIRAL 2 - see ALPHA-HELIX DOUBLE HELIX  .
 
 
 
Similar sounding terms:  hal·lux  he·li·case 
 
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