NOCTILUCENT CLOUD


Meaning of NOCTILUCENT CLOUD in English

Pronunciation: ˌ näk-t ə - ' lü-s ə nt-

Function: 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 Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.