perturbation
Definitions
A deviation of a system, moving object, or process from its regular or normal state or path, caused by an outside influence.
A cause of mental disquiet, disturbance, or agitation.
A minor change in the physical state or orbit of a celestial body due to the gravitational influence of one or more nearby bodies.
Examples
The slight perturbation in the satellite's orbit was caused by the gravitational pull of a nearby asteroid.
Any minor perturbation in the chemical balance of the solution can significantly alter the final results of the experiment.
Synonyms
disturbance agitation disorder commotion upset turmoil unease