(1):

(a.) Of or pertaining to a king's crown, or coronation.

(2):

(a.) Of or pertaining to a corona (in any of the senses).

(3):

(a.) Of or pertaining to the top of the head or skull.

(4):

(a.) Of or pertaining to the shell of a sea urchin.

(5):

(n.) A crown; wreath; garland.

(6):

(n.) The frontal bone, over which the ancients wore their coronae or garlands.