Emily Dickinson Lexicon

CO-RO'NA, n. [L. a crown.]

1. In architecture, a large flat member of a cornice, crowning the entablature, and the whole order; and called by workmen the drip. Chambers.
2. In anatomy, the upper surface of the molar teeth or grinders.
3. In botany, the circumference or margin of a radiated compound flower. – Encyc. An appendage of the corol or petals of a flower, proceeding from the base of the limb. – Lindley. Also, the appendage to the top of seeds, which enables them to disperse. – Martyn.
4. In optics, a halo or luminous circle around the sun, moon, or stars. – Encyc.