perturbation : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: perturbation	by the DICT Development Group
2 results for perturbation
From WordNet (r) 3.0 (2006) [wn]:
perturbation n an unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me" Synonym(s): disturbance, perturbation, upset (physics) a secondary influence on a system that causes it to deviate slightly activity that is a malfunction, intrusion, or interruption; "the term `distress' connotes some degree of perturbation and emotional upset"; "he looked around for the source of the disturbance"; "there was a disturbance of neural function" Synonym(s): perturbation, disturbance a disposition that is confused or nervous and upset Synonym(s): perturbation, fluster the act of causing disorder Synonym(s): disruption, perturbation
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Perturbation \Per`tur*ba"tion\, n. [L. perturbatio: cf. F. perturbation.] 1. The act of perturbing, or the state of being perturbed; esp., agitation of mind. 2. (Astron.) 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.