Webster's English Dictionary

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sinuate

sin.u.ate \'sin-y*-w*t, -.wa-t\ \-.wa-t\ \-w*t-le-, -.wa-t-\ aj [L 
   sinuatus, pp. of sinuare to bend, fr. sinus curve] : having the margin wavy 
   with strong indentations {~ leaves}  - sin.u.ate vi