Source : Webster's Revised Unabridged Dictionary (1913)

Coronal \Cor"o*nal\ (k?r"?-nal or, esp. in science, k?-r?"nal;
   277), a. [L. coronalis: cf. F. coronal.]
   1. Of or pertaining to a corona (in any of the senses).

            The coronal light during the eclipse is faint.
                                                  --Abney.

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

            The law and his coronal oath require his undeniable
            assent to what laws the Parliament agree upon.
                                                  --Milton.

   3. Of or pertaining to the top of the head or skull.

   4. (Zo["o]l.) Of or pertaining to the shell of a sea urchin.

   {Coronal suture} (Anat.), a suture extending across the skull
      between the parietal and frontal bones; the
      fronto-parietal suture.

Source : WordNet®

coronal suture
     n : the suture between the parietal and frontal bones of the
         skull [syn: {sutura coronalis}]