noctilucent

IPA: nˈɑktaɪɫˈusɪnt

(meteorology) Shining or glowing at night, especially of very high-altitude clouds that reflect sunlight long after sunset; nightshining.

Examples of "noctilucent" in Sentences

"noctilucent" clouds have become more common in the past 50 years.
The clouds are intended to simulate naturally-occurring phenomena called noctilucent clouds, which are the highest clouds in the atmosphere.
Look for the Plough in the NW, the Square of Pegasus in the E, and remain on the alert for noctilucent clouds above the NW to NE horizon, perhaps near Capella in Auriga.
That route saves fuel and avoids high-altitude ice clouds, called noctilucent clouds, that form during the summer between 50 degrees and 70 degrees north and south of the equator.
Noguchi sent down other beautiful shots, including “priceless” noctilucent clouds above Antarctica, city lights above Tokyo, and Port-Au-Prince, Haiti with “prayers” from the crew.
Scientists claim these "noctilucent" clouds -- formations that are similar to what was seen after the Tunguska event -- reach the poles because water vapor appears to be quickly traveling in two dimensions, rather than three.