Long gone are the days when a "robotic movement" meant something jerky, awkward, and stiff: The new robo-fish that have just been unveiled by engineers at the Massachusetts Institute of Technology swim through the water with sinuous grace.
-- Eliza Strickland, "Robo-Fish Are Ready to Take to the Seas", Discover Magazine, August 25, 2009
A single tree With sinuous trunk, boughs exquisitely wreathed, Grew there; an ash which Winter for himself Decked out with pride, and with outlandish grace
-- William Wordsworth, The Prelude, Book VI, "Cambridge and the Alps"
The final 15 miles featured narrow and sinuous roads made even tighter by huge crowds lining the sides. Crashes seemed inevitable.
-- Samuel Abt, "CYCLING; Crashes Jolt the Standings, And Oust a Tour Favorite", New York Times, July 5, 2006
Sinuous is from Latin sinuōsus, from sinus, curve.