Definition of coronal

• a. - Of or pertaining to a corona (in any of the senses).
• a. - Of or pertaining to a king's crown, or coronation.
• a. - Of or pertaining to the top of the head or skull.
• a. - Of or pertaining to the shell of a sea urchin.
• n. - A crown; wreath; garland.
• n. - The frontal bone, over which the ancients wore their coronae or garlands.