Definitions

1. adjective

relating to or based on the study of the relations of parts to the whole, especially in reference to the structure of the human body

“The orthic approach to anatomy emphasizes the interdependence of body parts.”

2. noun

a line that joins the centers of two opposite sides of a triangle, or a line that represents the relationship between two parts or elements

“The orthic line in the painting highlights the symmetry of the composition.”