perturbative

[pur-ter-bey-tiv, per-tur-buh-tiv]
adjective
having a tendency to perturb; disturbing.

Origin:
1630–40; < Late Latin perturbātīvus. See perturbation, -ive

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Example sentences
Their short distance behavior is arguably better than that of string theory, where one doesn't have a non-perturbative definition.
Methods to apply perturbative corrections to configuration interaction have been developed.
Two traditional approaches exist to the modelling of perturbative corrections.
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