per·tur·ba·tive

[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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00:10
Perturbative is always a great word to know.
So is interrobang. Does it mean:
a scrap or morsel of food left at a meal.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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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.
Two traditional approaches exist to the modelling of perturbative corrections.
Methods to apply perturbative corrections to configuration interaction have been developed.
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