rotation

Definition

The act of turning around a centre or an axis.

Etymology

Borrowed from Latin rotatiō. By surface analysis, rotate + -ion.

Example Sentences

• "An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes."
• "The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere."
• "Earth's moon completes a rotation every twenty-seven days or so."

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