PERTURBATION


Meaning of PERTURBATION in English

[noun] [U] [formal]She displayed signs of increasing perturbation (= worry) as she hurried to meet him.(specialized) A perturbation is also a small change in the regular motion of an object.Perturbations in the orbit of the planet Uranus led to the discovery of Neptune in 1846.

Cambridge English vocab.      Кембриджский английский словарь.