| 单词 | luminescence |
| 释义 | luminescence (once / 102777 pages) n When some object gives off light, that light is called luminescence. The luminescence of a lighthouse helps keep boats safe on foggy nights. Glow-in-the-dark stars stuck to your bedroom ceiling have a luminescence you can see when you turn out the light at night, and lightning bugs blink on and off with luminescence in the summertime. Luminescence, scientifically speaking, describes a glow or light that's emitted at a cool temperature, rather than one caused by a fire, for example. The Latin root is lumen, or "light." WORD FAMILYluminescence: luminescences+/luminesce: luminescence, luminescent USAGE EXAMPLESThe dreamy-looking things give off a gentle luminescence as they float in the lonely darkness, making them more conspicuous to predators such as seals. Seattle Times(Dec 01, 2016) Ultimately, Turner discovered the shimmering light and color of Italy that “changed his palette irrevocably” and imbued his late works with a dreamlike luminescence. Washington Post(Oct 17, 2016) It can be disguised by cutting and polishing but the luminescence imaging of the De Beers detection equipment makes the difference obvious. Reuters(Aug 17, 2016) 1n light not due to incandescence; occurs at low temperatures Hypo|Hyper bioluminescence luminescence produced by physiological processes (as in the firefly) chemiluminescenceluminescence resulting from a chemical reaction as the oxidation of luciferin in fireflies light, visible light, visible radiation (physics) electromagnetic radiation that can produce a visual sensation 2n light from nonthermal sources Syn|Hyper glow brightness, brightness level, light, luminance, luminosity, luminousness the quality of being luminous; emitting or reflecting light |
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