A retort ring is a laboratory tool used to support glassware, such as flasks and test tubes, over a heat source. It consists of a circular metal ring with a raised lip that helps to hold the glassware in place.
Retort, vessel used for distillation of substances that are placed inside and subjected to heat.
The simple form of retort, used in some laboratories, is a glass or metal bulb having a long, curved spout through which the distillate may pass to enter a receiving vessel.