Nouns

(n)aureole, coronathe outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
(n)corona(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
(n)corona discharge, corona, corposant, St. Elmo's fire, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's fire, Saint Ulmo's light, electric glowan electrical discharge accompanied by ionization of surrounding atmosphere
(n)coronaone or more circles of light seen around a luminous object
(n)corona(anatomy) any structure that resembles a crown in shape
(n)coronaa long cigar with blunt ends