adj. 1 Astron. & Bot. of a corona. 2 Anat. of the crown of the head. coronal bone the frontal bone of the skull. coronal plane an imaginary plane dividing the body into dorsal and ventral parts. coronal suture a transverse suture of the skull separating the frontal bone from the parietal bones.
[ F coronal or L coronalis (as CORONA(1)) ]