Tom saw an undulating motion in the hillocks below.

A huge ray raised a cloud of sand as it streaked away with an undulating motion of its body.

Moving one's fingers in an undulating motion, palm out, pointing up, means approval of what's being said.

Its throat was working in little, undulating motions.

It is mere undulating molecular motion, nothing more.

It offers the Active Seat, which massages the driver with an undulating motion.

Safina made an undulating motion with her hand to describe the clay courts at Spartak.

As far as they could gaze, this lawn rose and sank with the undulating motion of an old English park.

Every undulating motion of her lithe body was provocative.

Her full moon buttocks moved in an undulating motion exquisite to watch.