undulation

I imagined a valve bobbing in the water, slowly elevating the water in a reservoir with each wave undulation.

Peristalsis is the undulation of the esophagus, stomach, and intestines which pushes food forward.

In that case, you might suspect that noise function needs a 12th order polynomial to fit the undulation pattern, just to get the necessary number of humps.

Which is why I don't have any particular sympathy for the undulations in the job market of a salaried employee - at any point, they can freelance like I have to fill the gaps.

[1]"To some researchers, the experiments suggest that quantum objects are as definite as droplets, and that they too are guided by pilot waves — in this case, fluid-like undulations in space and time.

Vanilla is a circular white-yellow area with ripples like it'd have if a wind was blowing "upwards"; seaweed has a relaxing orange-yellow undulation to it; hotdogs have a white-yellow "jailbar" look, etc.

It suggested a route that would bypass a couple miles of slow traffic, but the road it sent me down was a dirt road with a periodic undulation in it that caused massive vibration, and my car and the two or three others that were on it were throwing up so much dust it was very hard to see.