Basting elements, drippers, basting rings are more common terms. BSR used dimples for the same purpose, touting them as more sanitary. Wagner patented zig-zag concentric rings; Vollrath used its name embossed on the underside of the lid. But yes, all to the same end: condensation on the lid dripping more evenly over the cooking food and not all running to the sides or seeping out the lid joint.