corona Definition

corona
noun coronae, coronas

1. astron.
The outer atmosphere of the Sun, consisting of a halo of hot luminous gases that boil from its surface, visible during a total solar eclipse.
2. astron.
A circle of light which appears around the Sun or the Moon.
3. bot.
In certain plants, eg the daffodil: a trumpet-like outgrowth from the petals.
4. physics.
The glowing region produced by ionization of the air surrounding a high-voltage conductor.
5. A round pendant chandelier.
6. archit.
The large flat projection of a cornice.

Etymology: 16c: Latin, meaning ‘crown'.