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a gun that can fire bursts of usually destructive or lethal rays:
a science fiction novel whose hero has a ray gun made of gold.
a child’s futuristic toy gun that emits sparks, whirring noises, etc.
(in science fiction) a gun that emits rays to paralyse, stun, or destroy


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  • Rayleigh

    [rey-lee] /ˈreɪ li/ noun 1. John William Strutt [struht] /strʌt/ (Show IPA), 3rd Baron, 1842–1919, English physicist: Nobel prize 1904. /ˈreɪlɪ/ noun 1. Lord, title of John William Strutt, 1842–1919, British physicist. He discovered argon (1894) with Ramsay and made important contributions to the theory of sound, the theory of scattering of radiation, etc. Nobel […]

  • Rayleigh disc

    noun 1. a small light disc suspended in the path of a sound wave, used to measure the intensity of the sound by analysing the resulting deflection of the disc

  • 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.

  • Rayleigh distribution

    mathematics A curve that yields a good approximation to the actual labour curves on software projects. [Details? Equation?] (1996-05-29)

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