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

 

sinuous

 adjective
adjective
BrE BrE//ˈsɪnjuəs//
 
; NAmE NAmE//ˈsɪnjuəs//
 
(literary)
 
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turning while moving, in an elegant way; having many curves a sinuous movement the sinuous grace of a cat the sinuous course of the river Word Origin late 16th cent.: from French sinueux or Latin sinuosus, from sinus ‘a bend’.
See the Oxford Advanced American Dictionary entry: sinuous