| perturbation | 1. The act of perturbing, or the state of being perturbed; especially, agitation of mind. 2. <astronomy> 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. Origin: L. Perturbatio: cf. F. Perturbation. Source: Websters Dictionary (01 Mar 1998) |
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