undulation

un·du·la·tion  (nj-lshn, ndy-, -d-)

n.

1. A regular rising and falling or movement to alternating sides; movement in waves.

2. A wavelike form, outline, or appearance.

3. One of a series of waves or wavelike segments.

Thesaurus

Noun	1.	undulation - an undulating curve                   wave curve, curved shape - the trace of a point whose direction of motion changes sine curve, sinusoid - the curve of y=sin x
	2.	undulation - wavelike motion; a gentle rising and falling in the manner of waves motion, movement - a natural event that involves a change in the position or location of something
	3.	undulation - (physics) a movement up and down or back and forth wave natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics" motion, movement - a natural event that involves a change in the position or location of something gravitation wave, gravity wave - (physics) a wave that is hypothesized to propagate gravity and to travel at the speed of light sine wave - a wave whose waveform resembles a sine curve oscillation, vibration - (physics) a regular periodic variation in value about a mean fluctuation - a wave motion; "the fluctuations of the sea" seiche - a wave on the surface of a lake or landlocked bay; caused by atmospheric or seismic disturbances standing wave, stationary wave - a wave (as a sound wave in a chamber or an electromagnetic wave in a transmission line) in which the ratio of its instantaneous amplitude at one point to that at any other point does not vary with time traveling wave, travelling wave - a wave in which the medium moves in the direction of propagation of the wave acoustic wave, sound wave - (acoustics) a wave that transmits sound wave form, wave shape, waveform - the shape of a wave illustrated graphically by plotting the values of the period quantity against time blast wave, shock wave - a region of high pressure travelling through a gas at a high velocity; "the explosion created a shock wave" pulsation, pulse, pulsing, impulse - (electronics) a sharp transient wave in the normal electrical state (or a series of such transients); "the pulsations seemed to be coming from a star" flapping, fluttering, flap, flutter - the motion made by flapping up and down