airglow
/ˈɛɹɡlˌoʊ/
Word Rarity
Very rare
Frequency: 1.52 in modern English
11
Scrabble Score
7
Letters
2
Syllables
7
Unique Chars
Meaning
noun
A faint illumination in the sky due to photochemical luminescence in the upper atmosphere, now rarely observed by earthbound humans without the assistance of instruments.
Uncountable