sin·u·os·i·ty /ˌsɪnjəˈwɑsəti/
  彎曲,曲折,彎曲處
  Sin·u·os·i·ty n.; pl. Sinuosities
  1. Quality or state of being sinuous.
  2. A bend, or a series of bends and turns; a winding, or a series of windings; a wave line; a curve.
     A line of coast certainly amounting, with its sinuosities, to more than 700 miles.   --Sydney Smith.
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  sinuosity
       n : having curves; "he hated the sinuosity of mountain roads"
           [syn: sinuousness]