Category:Perturbation

Per`tur*ba"tion, n. Etym: [l. perturbatio: cf. F. perturbation.]

1. The act of perturbing, or the state of being perturbed; esp., Agitation of mind.

2. (astron.)

Defn: a disturbance in the regular elliptic or other motion of a Heavenly body, produced by some force additional to that which causes Its regular motion; as, the perturbations of the planets are caused By their attraction on each other. Newcomb.