noun, Mechanics, Geology.
a wave along the surface of a solid, elastic body, especially along the surface of the earth.
A type of seismic surface wave that moves with a rolling motion that consists of a combination of particle motion perpendicular and parallel to the main direction of wave propagation. The amplitude of this motion decreases with depth. Like primary waves, Rayleigh waves are alternatingly compressional and extensional (they cause changes in the volume of the rocks they pass through). Rayleigh waves travel slower than Love waves.
[rey-lis] /ˈreɪ lɪs/ adjective 1. lacking or raylike parts. 2. unlit, dark, or gloomy: a rayless cave. /ˈreɪlɪs/ adjective 1. dark; gloomy 2. lacking rays: a rayless flower
/ˈreɪlɪt/ noun 1. a small ray
[rey-muh nd] /ˈreɪ mənd/ noun 1. Henry Jarvis [jahr-vis] /ˈdʒɑr vɪs/ (Show IPA), 1820–69, U.S. publicist: founder of The New York Times. 2. a male given name: from Germanic words meaning “counsel” and “protection.”. masc. proper name, from Old French Raimund, from Frankish *Raginmund “counsel-protection” or “might-protection,” from ragin “counsel, might” + mund “hand, protection” […]
- Ray of sunshine
noun phrase An infectiously happy person (1915+)