airglow
A faint illumination in the sky due to photochemical luminescence in the upper…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.
US/ˈɛɹɡlˌoʊ/
Meaning
1 senses(uncountable, usually)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.
Origin
From air + glow.From air + glow.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: airglows| Singular | airglow |
|---|
uncountable
Synonyms
1 synonymsfaint illumination due to photochemical luminescence:electroglow
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable