Merriam-Webster Collegiate Dictionary - undulated

 adjective see undulate I UNDULATION  noun  Date: 1646  1.  a. a rising and falling in waves  b. a wavelike motion to and fro in a fluid or elastic medium propagated continuously among its particles but with little or no permanent translation of the particles in the direction of the propagation ; vibration  2. the pulsation caused by the vibrating together of two tones not quite in unison  3. a wavy appearance, outline, or form ; waviness