meridian

me·rid·i·an

noun \mə-ˈrid-ē-ən\

Definition of MERIDIAN

1

: an imaginary circle or closed curve on the surface of a sphere or globe-shaped body (as the eyeball) that lies in a plane passing through the poles

2

: any of the pathways along which the body's vital energy flows according to the theory of acupuncture

—meridian adjective