noctilucent
/nok-tuh-loo-suhnt/US // ˌnɒk təˈlu sənt //UK // (ˌnɒktɪˈluːsənt) //
夜明珠,不夜城,夜光,不夜天
Definitions
adj.形容词 adjective
- 1
Meteorology.
- : visible during the short night of the summer.
Examples
At these altitudes, then, water vapor itself can readily cool the air enough to create noctilucent clouds.
Level 5Browse all words →