Sagittal a. : Of or pertaining to an arrow; resembling an arrow; furnished with an arrowlike appendage.

Sagittal 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.

Sagittal a. : In the mesial plane; mesial; as, a sagittal section of an animal.

Example:
what body movements are made in the frontal, Sagittal, and horizontal planes?

Taxonomy
sagittal plane, planes, body, Sagittal axis, portions, coronal plane, free encyclopedia, the human body, arrow, sagittal, passing, perpendicular, lies, limbs, divides, imaginary plane, Variations, midline structures.

Defination from the web:
sagittal plane of the human body is an imaginary plane that travels vertically from the top to the bottom of the body along the Y axis, ... Another explanation would be the notching of the sagittal suture posteriorly by the lamboidal suture—similar to feathers on an arrow. ...