corona
corona - noun
the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
an electrical discharge accompanied by ionization of surrounding atmosphere
one or more circles of light seen around a luminous object
(anatomy) any structure that resembles a crown in shape
corona - thesaurus
aureole
corposant