noun, noun which may take the genitive case particle 'no'
perturbation
Technical term in physics for a small disturbance or change in a system, often used in contexts like orbital mechanics or quantum mechanics.
Perturbation theory is often used in quantum mechanics.
A small perturbation was observed in the planet's orbit.
The term is composed of 摂 (to take in, to govern) and 動 (motion), likely a direct translation of the English 'perturbation' in a physics context. The exact historical derivation is uncertain.