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perturbation

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perturbation

Main Entry:: per·tur·ba·tion
Pronunciation:: \ˌpər-tər-ˈbā-shən, ˌpər-ˌtər-\
Function:: noun
Date:: 14th century

1: the action of perturbing : the state of being perturbed2: a disturbance of motion, course, arrangement, or state of equilibrium ; especially : a disturbance of the regular and usually elliptical course of motion of a celestial body that is produced by some force additional to that which causes its regular motion

— per·tur·ba·tion·al

Listen to the pronunciation of perturbational

\-shnəl, -shə-n^əl\ adjective

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