Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: undulatory  'ún-ju-lu,to-ree [N. Amer], ,ún-dyû-lu-t(u-)ree [Brit]
  1. Resembling waves in form, outline or motion
    "The undulatory movement of the snake was mesmerizing";
    - undulant