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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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
Get an oscillating fan and set it to rotate so it makes the hanging things move at intervals.
The decaying, oscillating tail that follows the spike displays many tens of cycles at the neutron star spin rate.
Most animals can tell how fast the electric field in a light wave is
  oscillating, which is perceived as color.
Otherwise, patrons rely on a battery of oscillating fans to stir the equatorial
  air as they hunch over their food.
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