say it: kur-OH-nuh
corona is a noun meaning "the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse". It carries 6 recorded senses.
(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
botany
an electrical discharge accompanied by ionization of surrounding atmosphere
one or more circles of light seen around a luminous object
a long cigar with blunt ends
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for corona come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.