sylvanshine
/ˈsɪl.vənˌʃeɪn/
sylvanshine means an optical phenomenon in which dew-covered waxy-leaved trees retroreflect beams of light, as from a vehicle's headlights. Lexicurio rates it Sui generis — a strength score of 91 out of 100.
sylvanshine is pronounced /ˈsɪl.vənˌʃeɪn/.
Why “sylvanshine” is a great word
SYLVANSHINE — [Noun] An optical phenomenon in which dew-covered waxy-leaved trees retroreflect beams of artificial light, such as from vehicle headlights, directly to their source. From sylvan ("of the woods") + shine ("to emit light"), coined in 1994 by Professor Alistair Fraser of Pennsylvania State University. Unlike a "glory" (a colored halo around a shadow in mist) or "bioluminescence" (light actively generated by an organism), sylvanshine is a cold, geometric trick of passive optics. It is the sudden, ghostly apparition of a roadside thicket in a high-beam’s sweep, the perfect, momentary alignment of a thousand water beads on laurel and rhododendron, a fleeting architecture of water and wax conjured from headlight glare. This is not the forest breathing light, but holding it, briefly captive, in a constellation of wet, black velvet pierced by a thousand answering stars—a reminder that the woods are full of mirrors, not just shadows.
Etymology
From sylvan + shine, coined by in 1994 by Professor Alistair Fraser of Pennsylvania State University.
noun
- An optical phenomenon in which dew-covered waxy-leaved trees retroreflect beams of light, as from a vehicle's headlights.