Definition of helical adjective from the Oxford Advanced Learner's Dictionary

 

helical

 adjective
adjective
BrE BrE//ˈhelɪkl//
 
; NAmE NAmE//ˈhelɪkl//
 
; BrE BrE//ˈhiːlɪkl//
 
; NAmE NAmE//ˈhiːlɪkl//
 
(specialist)
 
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like a helix
See the Oxford Advanced American Dictionary entry: helical