ˈsajəd. ə l, -ət ə l adjective
Etymology: Latin sagitta + English -al
1.
a. : of or relating to the suture between the parietal bones of the skull
b. : of, relating to, or situated in the median plane of the body or any plane parallel thereto
2. : of, relating to, or shaped like an arrow or arrowhead
• sag·it·tal·ly - ə lē adverb