dayglow

[ dey-gloh ]

/ ˈdeɪˌgloʊ /

noun

See under airglow.

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Origin of dayglow

First recorded in 1955–60; day + glow

Words nearby dayglow

daych, daydream, dayflower, dayfly, daygirl, dayglow, dayhop, daylight, daylight lamp, daylight robbery, daylight saving

Definition for dayglow (2 of 2)

airglow

[ air-gloh ]

/ ˈɛərˌgloʊ /

noun

a dim light from the upper atmosphere caused by emissions from atoms and molecules ionized by solar radiation: observed at night (nightglow), during the day (dayglow), and at twilight (twilight glow), with each having slightly different characteristics.

Origin of airglow

First recorded in 1950–55; air¹ + glow

British Dictionary definitions for dayglow

airglow

/ (ˈɛəˌɡləʊ) /

noun

the faint light from the upper atmosphere in the night sky, esp in low latitudes

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for dayglow

airglow

[ âr′glō′ ]

A faint photochemical luminescence in the upper atmosphere caused by the collision of x-rays and charged particles from the Sun with atoms and molecules, especially of oxygen, sodium, and the hydroxyl radical (OH). Airglow is strongest over low and middle latitudes.