noun pl. coronas -·nas or coronae -·nae (-nē)

1. a crown or something resembling a crown
2. a circular chandelier hanging from a church ceiling
3. a long cigar with straight sides and blunt ends
4. Anat.
   1. a crownlike part
   2. the crown of a tooth, of a skull, etc.
5. Archit. the top projection of a cornice
6. Astron.
   1. the layer of ionized gas surrounding the sun, characterized by an extremely low density, an extremely high temperature, and a constantly changing shape extending great distances from the sun: clearly visible during a total solar eclipse
   2. a ring of colored light seen around a luminous body, as the sun or moon, formed by the diffraction of light caused by mist, dust, etc.
7. Bot. an extra whorl of flower parts between the corolla and the stamens, as in the daffodil, forming a crownlike or cuplike part
8. Elec. a luminous discharge that may occur around a high-voltage conductor due to ionization of the surrounding air

Etymology: L, crown