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wave·length

(wāvlĕngkth′, -lĕngth′, -lĕnth′)

The distance between one peak of a wave to the next corresponding peak, or between any two adjacent corresponding points, defined as the speed of a wave divided by its frequency.

Idiom:

on the same wavelengthInformal

In complete accord; in harmony:"a fluid ... production in which author, director, designer and cast seem to be working on the same wavelength"(James Lardner).

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wavelength

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

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Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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