Jisho

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じてん 自転
JLPT N1 Links
Noun, Suru verb, Intransitive verb
1. rotation (on an axis)​Astronomy, See also 公転
Noun, Suru verb, Intransitive verb
2. rotation (under its own power)​
Wikipedia definition
3. Rotation around a fixed axis​Rotation around a fixed axis is a special case of rotational motion. The fixed axis hypothesis exclude the possibility of a moving axis, and cannot describe such phenomena as wobbling or precession. According to Euler's rotation theorem, simultaneous rotation around more than one axis at the same time is impossible. If two rotations are forced at the same time, a new axis of rotation will appear.
Read “Rotation around a fixed axis” on English Wikipedia
Read “自転” on Japanese Wikipedia
Read “Rotation around a fixed axis” on DBpedia

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