Main Entry: me·rid·i·an

Pronunciation: \mə-ˈrid-ē-ən\

Function: noun

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