Sagittal \Sag"it*tal\, a. [L. sagitta an arrow: cf. F. sagittal.]

1. Of or pertaining to an arrow; resembling an arrow; furnished with an arrowlike appendage.

2. (Anat.)
   (a) Of or pertaining to the sagittal suture; in the region of the sagittal suture; rabdoidal; as, the sagittal furrow, or groove, on the inner surface of the roof of the skull.
   (b) In the mesial plane; mesial; as, a sagittal section of an animal.

Sagittal suture (Anat.), the suture between the two parietal bones in the top of the skull; -- called also rabdoidal suture, and interparietal suture.

Source: Webster's Revised Unabridged Dictionary (1913)