corona

The outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse.

An electrical discharge accompanied by ionization of surrounding atmosphere.

A long cigar with blunt ends.

(anatomy) any structure that resembles a crown in shape.

(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower.

One or more circles of light seen around a luminous object.