- the act of perturbing.
- the state of being perturbed.
- mental disquiet, disturbance, or agitation.
- a cause of mental disquiet, disturbance, or agitation.
- Astronomy. deviation of a celestial body from a regular orbit about its primary, caused by the presence of one or more other bodies that act upon the celestial body.
Origin of perturbation
Examples from the Web for perturbation
Say your portfolio is worth a third less than before this recession or crash or perturbation or whatever you want to call it.So, When Do We Become a Third World Nation?
December 2, 2008
In the case of the world, the perturbation is very slight, and amounts only to a reversal of motion.Statesman
Other than this there was no 347 sign of perturbation on its owner's part.Fair Harbor
Joseph Crosby Lincoln
In spite of his perturbation he had been amused for the moment.Cap'n Dan's Daughter
Joseph C. Lincoln
Hephzy seized the opportunity to express to me her perturbation.Kent Knowles: Quahaug
Joseph C. Lincoln
It was not sorrow, and it was not pain; it was anxiety, uncertainty, perturbation.A Son of Hagar
Sir Hall Caine
- the act of perturbing or the state of being perturbed
- a cause of disturbance or upset
- physics a secondary influence on a system that modifies simple behaviour, such as the effect of the other electrons on one electron in an atom
- astronomy a small continuous deviation in the inclination and eccentricity of the orbit of a planet or comet, due to the attraction of neighbouring planets
Word Origin and History for perturbation
late 14c., from Old French perturbacion "disturbance, confusion" (14c.) and directly from Latin perturbationem (nominative perturbatio) "confusion, disorder, disturbance," noun of action from past participle stem of perturbare (see perturb).
- A small change in a physical system, most often in a physical system at equilibrium that is disturbed from the outside.
- Variation in a designated orbit, as of a planet, that results from the influence of one or more external bodies. Gravitational attraction between planets can cause perturbations and cause a planet to deviate from its expected orbit. Perturbations in Neptune's orbit led to the discovery of the object-Pluto-that was causing the perturbation. Perturbations in the orbits of stars have led to the discovery of planetary systems outside of our Solar system.