perturbation
This term describes a disruption of equilibrium, whether in a human psyche or a physical system. In psychological contexts, it conveys a sense of agitation or mental disquiet, often resulting from an unexpected event that breaks one's peace of mind.
In scientific and mathematical contexts, it refers to a precise, often minute deviation from a predicted path or state. It is frequently used in celestial mechanics to describe how the gravity of one body alters the orbit of another, shifting the focus from total chaos to a measurable variance from a norm.
Meanings
A feeling of anxiety or mental uneasiness.
His sudden departure caused a great deal of perturbation among the staff.
Examples
A gravitational perturbation revealed the hidden planet.
Historical records indicate a perturbation in the royal succession.