noctilucent cloud
/ˌnɒktɪˈluːs(ə)nt
/noun
A luminous cloud of a kind occasionally seen at night in summer in high latitudes, at the altitude of the mesopause: he estimated the height of the noctilucent clouds he saw at 80 to 100 km...
- One of them is something that I've never actually seen but I had seen pictures of; it's a thing called a noctilucent cloud, this is a cloud that occurs at about 86 kilometres, it may be present more often than we see it.
- ‘Humbug’ refers to natural phenomena such as heavenly bodies, noctilucent clouds, ball lightning, and man-made objects such as glowing blimps.
- Evidence of these changes comes from sightings of noctilucent clouds, very unusual clouds seen only in polar regions and known to be in the mesosphere.
Origin
Late 19th century: from Latin nox, noct- 'night' + lucere 'to shine' + -ent.
- have (or take) a leak
- have (or take) a pop at
- have (or throw) a fit
- have (or want) no truck with
- have (or with) an eye to
- have (or with) an eye to (or for or on) the main chance
- have (or with) one's fingers (or hand) in the till
- have other (or bigger) fish to fry
- haver
- haverbread
- havercake
- have regard to
- haverel
- haverer
- haver grass
- Haverhill
- havermeal
- haversack
- Haversian canal
- Haversian gland
- Haversian lamella
- Haversian space
- Haversian system
- haversin
- haversine