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Rayleigh disk

noun

, Acoustics, Mechanics.
  1. a small circular disk, usually of mica, that is suspended from a fiber and tends to be deflected at right angles to a stream of air, indicating by its deflection the intensity of a sound wave.

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Word History and Origins

Origin of Rayleigh disk1

First recorded in 1910–15; named after J. W. S. Rayleigh

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petrichor

[pet-ri-kawr]

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