perturbation

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Related to Perturbance: ameliorating, conferred, exultation, underwent, waylaid

perturbation

[pur′tərbā′shən]
Etymology: L, per + tubare, to disturb
a cause or a condition of disturbance, disorder, or confusion.

per·tur·ba·tion

(pĕrtŭr-bāshŭn)
In physical therapy, an external force applied to a person's center of mass in an attempt to move it from the base of support

perturbation

(pĕr″tĕr-bā′shŭn) [L. perturbare, thoroughly disordered]
1. The state of being greatly disturbed or agitated; uneasiness of mind.
2. A disturbance or a change in a structure or function, usually as a result of an external influence.

perturbation,

n a small disturbance that tips a metastable system over into disorder and chaos.
References in periodicals archive ?
Chronic sleep perturbances affect 10-20% of the population of Switzerland and almost everyone experiences sleep problems at least once in a lifetime.
Predation and potential environmental perturbances on Ancient Murrelets nesting in British Columbia.
To reject perturbances and ensure a good performance of any wind system additional control actions must be done, commonly they are made through the power interface.
for 21 days had normalized the elevated levels of blood glucose, total cholesterol, triglycerides and LDL levels also increased the serum levels of HDL and thus alleviated the observed biological perturbances when compare to HFD control, received only vehicle.
01) were significantly decreased from the normal levels; perturbances in all these lipid parameters resulted in greatly increased atherogenic index (p<0.