undulation

[uhn-juh-ley-shuhn, uhn-dyuh-, -duh-] Example Sentences Origin

un·du·la·tion

[uhn-juh-ley-shuhn, uhn-dyuh-, -duh-]
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. 2012.
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Undulation is always a great word to know.
So is wavelength. Does it mean:
the distance measured by the propagation of a wave between two successive points in the wave that are characterized by the same phase of oscillation
a progressive disturbance propagated in a medium without progress or advance by the points themselves, as in the transmission of sound or light
Example Sentences
  • The top edge is a triumph of undulation and its handle a swirl of curling leaves and clever loops.
  • She demonstrated a snakelike undulation of the arms and upper body called the cobra.
Collins
World English Dictionary
undulation (ˌʌndjʊˈleɪʃən)
 
n
1.  the act or an instance of undulating
2.  any wave or wavelike form, line, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

undulation
1640s, from M.L. *undulatio, from L.L. undulatus "wavy, undulated," from undula "wavelet," dim. of L. unda "wave" (see water).
Online Etymology Dictionary, © 2010 Douglas Harper
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