Meaning of NOCTILUCENT CLOUD in English

NOCTILUCENT CLOUD

transcription, транскрипция: [ ˌnäk-tə-ˈlü-s ə nt- ]

noun

Etymology: noctilucent ultimately from Latin noct- + lucent-, lucens lucent

Date: 1910

: a luminous thin usually colored cloud seen especially at twilight at a height of about 50 miles (80 kilometers)

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.