Almost black, and shaped like arrowheads, they maneuvered by slow undulations of their entire bodies, so that they looked rather like giant manta rays, swimming above some tropical reef.

Isaac surfaced, like a breaking froth on the curl of a slow undulation.

Where red leaves off is an ineffable redder red, called infrared, slow invisible undulations that can be felt against the skin as heat.

They began the long, slow, steady undulation that would last for fifteen minutes or more, if it could be measured, and end in a prolonged unendurable shuddering.

She tempted him with her eyes, with slow undulations of her body, desperate for him to take her.

He felt the Cyber sway and rock in slow undulations.

They sat on their hindquarters in the mud, short antennae standing proud, whistling in a long slow undulation.

No one had any stomach for fighting anyway; Sacrus and council soldiers stood side by side, exchanging uneasy glances as another long slow undulation moved through the ground.

It was hot and airless in the cabin, and the ship rolled sickeningly on the slow, greasy undulations of the current.