noctilucent cloud

play
noun noc·ti·lu·cent cloud \ˌnäk-tə-ˈlü-sənt-\

Definition of noctilucent cloud

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

Origin and Etymology of noctilucent cloud

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


First Known Use: circa 1934


Learn More about noctilucent cloud


Seen and Heard

What made you want to look up noctilucent cloud? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

capable of being understood in two ways

Get Word of the Day daily email!