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corona (n.)

1650s, "a crown," from Latin corona "a crown, a garland," in ancient Rome especially "a crown or garland bestowed for distinguished military service," from suffixed form of PIE root *sker- (2) "to turn, bend."

With many extended senses in botany, anatomy, etc. A coronavirus (by 1969) is so called for the spikes that protrude from its membranes and resemble the tines of a crown or the corona of the sun. The two "crown" constellations, Corona Borealis (according to fable, the crown of Ariadne) and Corona Australis, are both Ptolemaic. Astronomical sense of "luminous circle observed around the sun during total eclipses" is from 1809. As a brand of Cuban cigar, 1876. The brand of Mexican pale lager beer dates from 1925.

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Definitions of corona from WordNet

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