wave·length

[weyv-lengkth, -length, -lenth]
noun
1.
Physics. the distance, measured in the direction of propagation of a wave, between two successive points in the wave that are characterized by the same phase of oscillation.
2.
on the same wavelength, in sympathy or rapport: We seemed to be on the same wavelength from the moment we met.
Also, wave length.


Origin:
1855–60; wave + length

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
wavelength (ˈweɪvˌlɛŋθ) [Click for IPA pronunciation guide]
 
n
1.  λ the distance, measured in the direction of propagation, between two points of the same phase in consecutive cycles of a wave
2.  the wavelength of the carrier wave used by a particular broadcasting station
3.  informal on someone's wavelength, on the same wavelength having similar views, feelings, or thoughts (as someone else)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Wavelength is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Etymonline
Word Origin & History

wavelength
1850, "distance between peaks of a wave," from wave (n.) + length. Originally of spectra; radio sense is attested by 1925. Fig. sense of "mental harmony" is recorded from 1927, on analogy of radio waves.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

wavelength wave·length (wāv'lěngkth', -lěngth')
n.

Symbol λ The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
wavelength   (wāv'lěngkth')  Pronunciation Key 
The distance between one peak or crest of a wave and the next peak or crest. It is equal to the speed of the wave divided by its frequency, and to the speed of a wave times its period.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

wavelength definition


The distance between crests (or troughs) of a wave.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
L-band refers to the wavelength of the radar signal.
Anyone who's all thumbs can visit her local hair stylist, who will put her on
  the right wavelength.
It cannot ever have a frequency of zero nor a wavelength of zero.
The corresponding wavelength would be measured in a few fermis.
Image for wavelength
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