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English
Noun
ALAN (uncountable)
- Initialism of artificial light at night.
2021 March 16, Mattias Green, Yueng-Djern Lenn, 30-Second Oceans: 50 Key Ideas about the Sea's Importance to Life on Earth, 30 Second, →ISBN:Skyglow is a form of artificial light at night (ALAN) whereby the atmosphere scatters light back to Earth, creating a glowing dome of diffused light that can extend hundreds of kilometres into the sea.