| 单词 | helicoid | 
| 释义 | Word Frequency helicoid(ˈhɛlɪˌkɔɪd) adjective  also: helicoidal 1.  biology shaped like a spiral   a helicoid shell noun 2.  geometry any surface resembling that of a screw thread  Derived forms helicoidally (ˌheliˈcoidally) adverb  | 
	
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