verb (used without object), oscillated, oscillating.
to swing or move to and fro, as a pendulum does.
to vary or vacillate between differing beliefs, opinions, conditions, etc.: He oscillates regularly between elation and despair.
Physics. to have, produce, or generate oscillations.
Mathematics. (of a function, sequence, etc.) to tend to no limit, including infinity: The sequence 0, 1, 0, 1, … oscillates.
verb (used with object), oscillated, oscillating.
to cause to move to and fro; vibrate.

1720–30; < Latin oscillātus (past participle of oscillāre to swing, ride on a swing), equivalent to oscill(um) a swing + -ātus -ate1

interoscillate, verb, interoscillated, interoscillating.
unoscillating, adjective

oscillate, osculate.

1. See swing1. 2. fluctuate, waver.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
oscillate (ˈɒsɪˌleɪt)
1.  (intr) to move or swing from side to side regularly
2.  (intr) to waver between opinions, courses of action, etc
3.  physics to undergo or produce or cause to undergo or produce oscillation
[C18: from Latin oscillāre to swing, from oscillum a swing]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1726, from L. oscillat-, pp. stem of oscillare (see oscillation). 1917 in electronics. Related: Oscillated; oscillating.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

oscillate os·cil·late (ŏs'ə-lāt')
v. os·cil·lat·ed, os·cil·lat·ing, os·cil·lates

  1. To swing back and forth with a steady, uninterrupted rhythm.

  2. To vary between alternate extremes, usually within a definable period of time.

os'cil·la'tor n.
os'cil·la·to'ry (-lə-tôr'ē) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
There are actually two distinct proposals mentioned in the article, which
  confusingly oscillates between them.
Changes to the way it is set up can turn a stable rolling wheel into one that
  oscillates, then into one that is chaotic.
The electrons form an unstable bubble of charge that oscillates in a cavity
  designed for the purpose.
Jazz taste oscillates between decorum and expression, usually favoring the
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