Jisho

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Noun, Suru verb
1. rotation (usu. around something); revolution; turningSee also 自転
Wikipedia definition
2. RotationA rotation is a circular movement of an object around a center of rotation. A three-dimensional object rotates always around an imaginary line called a rotation axis. If the axis is within the body, and passes through its center of mass the body is said to rotate upon itself, or spin. A rotation about an external point, e.g. the Earth about the Sun, is called a revolution or orbital revolution, typically when it is produced by gravity.
Read “Rotation” on English Wikipedia
Read “回転” on Japanese Wikipedia
Read “Rotation” on DBpedia
Other forms
廻転 【かいてん】

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