Lewis & Short

sĭnŭōsus, a, um, adj. [1. sinus], full of bendings, windings, or curves; full of folds, bent, winding, sinuous (poet. and in postAug. prose; syn. tortuosus).

  1. I. Lit.: flexus anguis, Verg. G. 1, 244: volumina (serpentis), id. A. 11, 753: Maeander flexibus, Plin. 5, 29, 31, § 113: arcus, Ov. Am. 1, 1, 23: vela, Prop. 4 (5), 1, 15; Ov. H. 8, 23: vestis, id. M. 5, 68: folia lateribus, Plin. 16, 6, 8, § 19 et saep.
  2. II. Trop.
    1. A. Of style, full of digressions, diffuse: ratio narrandi, * Quint. 2, 4, 3: quaestio, Gell. 14, 2, 13.
    2. B. Sinuoso in pectore, in the recesses of my heart, Pers. 5, 27.
      * Adv.: sĭnŭōsē, intricately, in a roundabout manner: dicere sinuosius atque sollertius, Gell. 12, 5, 6.