halo

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/ˈheɪləʊ/ English

Definitions

A circular band of coloured light, visible around the sun or moon etc., caused by reflection and refraction of light by ice crystals in the atmosphere.
A cloud of gas and other matter surrounding and captured by the gravitational field of a large diffuse astronomical object, such as a galaxy or cluster of galaxies.
Anything resembling this band, such as an effect caused by imperfect developing of photographs.
Nimbus, a luminous disc, often of gold, around or over the heads of saints, etc., in religious paintings.