noun a crown; wreath; garland.
2. coronal ·adj of or pertaining to the shell of a sea urchin.
3. coronal ·adj of or pertaining to the top of the head or skull.
4. coronal ·adj of or pertaining to a king's crown, or coronation.
5. coronal ·adj of or pertaining to a corona (in any of the senses).
6. coronal ·noun the frontal bone, over which the ancients wore their coronae or garlands.