undulator

undulate

[v. uhn-juh-leyt, uhn-dyuh-, -duh-; adj. uhn-juh-lit, -leyt, uhn-dyuh-, -duh-]
verb (used without object), undulated, undulating.
1.
to move with a sinuous or wavelike motion; display a smooth rising-and-falling or side-to-side alternation of movement: The flag undulates in the breeze.
2.
to have a wavy form or surface; bend with successive curves in alternate directions.
3.
(of a sound) to rise and fall in pitch: the wail of a siren undulating in the distance.
verb (used with object), undulated, undulating.
4.
to cause to move in waves.
5.
to give a wavy form to.
adjective
6.
Also, undulated. having a wavelike or rippled form, surface, edge, etc.; wavy.

Origin:
1650–60; < Latin undulātus waved, equivalent to und(a) wave + -ul(a) -ule + -ātus -ate1

undulator, noun
nonundulate, adjective
nonundulating, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
undulate (ˈʌndjʊˌleɪt)
 
vb
1.  to move or cause to move in waves or as if in waves
2.  to have or provide with a wavy form or appearance
 
adj
3.  having a wavy or rippled appearance, margin, or form: an undulate leaf
 
[C17: from Latin undulātus, from unda a wave]
 
'undulator
 
n

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

undulate
1660s, from undulation. Related: undulated, undulating.
Online Etymology Dictionary, © 2010 Douglas Harper
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