Pronunciation: (saj'i-tl), [key]
a. of or pertaining to the suture between the parietal bones at the roof of the skull or to a venous canal within the skull and parallel to this suture.
b. (in direction or location) from front to back in the median plane or in a plane parallel to the median.
2. pertaining to or resembling an arrow or arrowhead.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.