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单词 helicoid
释义 helicoid
 —helicoidal,  adj.   —helicoidally,  adv.  
 /hel"i koyd', hee"li-/,  adj.  
  1. coiled or curving like a spiral.
  n.  
  2.  Geom.   a warped surface generated by a straight line moving so as to cut or touch a fixed helix.
 [1690-1700; < Gk helikoeidés of spiral form. See HELIC-, -OID]
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