one of the marginal florets surrounding the disk of tubular florets in the flower heads of certain composite plants, as the daisy.
One of the narrow flowers, resembling single petals, that surround the central disk in the capitulum or flower cluster of a plant of the composite family (Asteraceae or Compositae), such as the daisy or sunflower. Rays are often male flowers with sterile stamens. Also called ray, ray floret. See illustration at disk flower.
noun 1. 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. 2. a child’s futuristic toy gun that emits sparks, whirring noises, etc. noun 1. (in science fiction) a gun that emits rays to paralyse, stun, or destroy
[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
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.