coronae

noun

1. The luminous plasma atmosphere of the Sun or other star, extending millions of kilometres into space, most easily seen during a total solar eclipse.
2. A circle or set of circles visible around a bright celestial object, especially the Sun or the Moon, attributable to an optical phenomenon produced by the diffraction of its light by small water droplets or tiny ice crystals.
3. (by extension) Any luminous or crownlike ring around an object or person.
4. A luminous appearance caused by corona discharge, often seen as a bluish glow in the air adjacent to pointed metal conductors carrying high voltages.