Disturb or interfere with the usual path of an electron or atom.
3.
Cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull.
... hath been as a cloudy day, Yet still it hath not all been gloom, For many a wild and broken ray Hath cheer'd awhile my spirit's doom; As flow'rets on a river's rim, Whose shadows deck each passing wave, Thought lingers on, perturb'd and dim, Or sunbeam resting on a grave. Remember me—remember me— My latest thought ... — The Mirror of Literature, Amusement, and Instruction - Volume 13, No. 363, Saturday, March 28, 1829 • Various
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