corona

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

a long cigar with blunt ends