(1) A spheric or spindle-shaped condensation of phagocytic macrophages in a reticular stroma investing the wall of the splenic arterial capillaries shortly before they release their blood in the cords of red pulp. (2) The outer end of the inner segment of the retinal rods and cones. (3) Having the shape of an ellipse or oval. SYN: sheath of Schweigger-Seidel. [G. ellips, oval, + eidos, form]
