undulated

 Resembling, or in the nature of, waves; having a wavy surface; undulatory.  [1913 Webster]

 Waved obtusely up and down, near the margin, as a leaf or corolla; wavy.  [1913 Webster]

 Formed with elevations and depressions resembling waves; having wavelike color markings; as, an undulated shell.  [1913 Webster]