Webster's Revised Unabridged Dictionary · 1913

Sinuous

Sinuous , adjective

[Latin sinuosus, from sinus a bent surface, a curve: compare French sinueux. See Sinus.]

Bending in and out; of a serpentine or undulating form; winding; crooked.
Streaking the ground with sinuous trace. — Milton
Gardens bright with sinuous rills. — Coleridge