Definition of dayglow in English:

dayglow

noun

  • 1The glow of daylight. Chiefly poetic.

  • 2Atmospheric Physics. Electromagnetic radiation emitted by the atmosphere of a planet when it is illuminated by the sun.

Origin

Mid 19th century. From day + glow.

Pronunciation

dayglow

/ˈdeɪɡləʊ/