PERTURBATION
- Anxiety; mental uneasiness
- A cause of such anxiety or uneasiness
- A deviation of a system, moving object, or process from its regular or normal state of path, caused by an outside influence
- A slight alteration of a physical system, for example of the electrons in an atom, caused by a secondary influence
- A minor deviation in the course of a celestial body, caused by the gravitational attraction of a neighboring body
- the action of perturbing [n -S]
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