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undulation

 - 3 dictionary results

un⋅du⋅la⋅tion

  [uhn-juh-ley-shuhn, uhn-dyuh-, -duh-]
Use undulation in a Sentence
–noun
1. an act of undulating; a wavelike motion.
2. a wavy form or outline.
3. one of a series of wavelike bends, curves, or elevations.
4. Physics.
a. a wave.
b. the motion of waves.
Origin:
1640–50; undul(ate) + -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To undulation
un·du·la·tion   (ŭn'jə-lā'shən, ŭn'dyə-, -də-)   
n.  

  1. A regular rising and falling or movement to alternating sides; movement in waves.

  2. A wavelike form, outline, or appearance.

  3. One of a series of waves or wavelike segments.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

undulation 
1646, from M.L. *undulatio, from L.L. undulatus "wavy, undulated," from undula "wavelet," dim. of L. unda "wave" (see water). The verb undulate is attested from 1664.
Online Etymology Dictionary, © 2001 Douglas Harper
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